How do I sacrifice/discard my cards on the field.

[Airaneon]

I saw a bot sacrificing 3 cards in a row because of a effect of its card, something like "everytime a artifact creature dies you deal 3 damge to your opponent" and I'm 100% that there wasn't an creature/spell on the field that had the effect of sacrificing creatures so I suppose u can do that at will, but how?

Thanks for your attention

[pjfeigel]

Originally posted by Airaneon:

I saw a bot sacrificing 3 cards in a row because of a effect of its card,

You cannot sacrifice a permanent on the battlefield, or Discard a card in your hand, simply beause you feel like it. You actually need to have some Cost/Effect that allows you to sacrifice a permanent, or discard a card.

something like "everytime a artifact creature dies you deal 3 damge to your opponent"

Merely controlling Pia's Revolution is not enough. There must be something else.

and I'm 100% that there wasn't an creature/spell on the field that had the effect of sacrificing creatures so I suppose u can do that at will, but how?

And, I'm 100% that you're simply not paying enough attention to the gamestate.

The AI likes to play with Defiant Salvager and Ravenous Intruder, which have an activated ability that costs the sacrificing of an Artifact.

[Airaneon]

It was not Pia's Revolution mate it was a black card. And if you have 100% that I was not paying attention to the gamestate even after of what I said you did not come here to help.

[pjfeigel]

Originally posted by Airaneon:

It was not Pia's Revolution mate it was a black card.

Hey buddy, I had to take a guess based on what little information you provided;
Artifact being put into the Graveyard -> 3 damage. And the only card that describes is Pia's Revolution.

If you now think this was a black card, then it could have been Marionette Master.
However, I have not seen the AI play that since AER was released.
Moreover, the Master causes the opponent to LOSE LIFE, it does not DEAL DAMAGE.

And if you have 100% that I was not paying attention to the gamestate even after of what I said you did not come here to help.

Buddy, I'm here to help. The problem here is that you aren't doing yourself any favors by being utterly unable to provide an accurate description of your gamestate.

For future reference, take a screenshot.

[seriaon]

Originally posted by Airaneon:

It was not Pia's Revolution mate it was a black card. And if you have 100% that I was not paying attention to the gamestate even after of what I said you did not come here to help.

Just post a screenshot so we can assess the situation. What you descriped is not possible and therefore inforamtion is missing.

[DarkSepho]

Originally posted by Airaneon:

It was not Pia's Revolution mate it was a black card. And if you have 100% that I was not paying attention to the gamestate even after of what I said you did not come here to help.

The fact that you are saying it doesn't make it true. As he said you can't sacrifice permanents at will, so you missed something

[seriaon]

But alternative facts say he is right XD

[DarkSepho]

Maybe metalwork colossus?

[Airaneon]

Originally posted by DarkSepho:

Maybe metalwork colossus?

Not this card as well.

[Airaneon]

Originally posted by seriaon:

Originally posted by Airaneon:

It was not Pia's Revolution mate it was a black card. And if you have 100% that I was not paying attention to the gamestate even after of what I said you did not come here to help.

Just post a screenshot so we can assess the situation. What you descriped is not possible and therefore inforamtion is missing.

I'm searching back for the card. I'll post it with the situation soon.

[Airaneon]

Originally posted by seriaon:

Originally posted by Airaneon:

It was not Pia's Revolution mate it was a black card. And if you have 100% that I was not paying attention to the gamestate even after of what I said you did not come here to help.

Just post a screenshot so we can assess the situation. What you descriped is not possible and therefore inforamtion is missing.

Found the card, it was Marionette Master. I apologize in advance for any grammar mistakes, english is not my mother language. The enemy had 2 Marionette Master ( 1 created 3 artifacts and 1 had 3x +1/+1 effect on it) a Chief of the Foundry and a Skysovereign, Consul Flagship. So, the enemy attack me with all the card except Skysovereign, Consul Flagship, and I blocked Chief of the Foundry cuz it was anoying as f***. I took the damage from the other cards and got the damage from Marionette Master's effect cuz I destroyed Chief and Artifact creature, but after that all the 1/1 monsters created by one of the MM started dying one after the other and I was piling up the damage from the MM effects because of that. And I was like "WTF is happening" enhanced the size of all the cards in the field and none had the "discard" effect. So I thought that the bot was simply discarding them to trigger the effect.

[pjfeigel]

Originally posted by Airaneon:

The enemy had 2 Marionette Master ( 1 created 3 artifacts and 1 had 3x +1/+1 effect on it) a Chief of the Foundry and a Skysovereign, Consul Flagship.

You were playing the 5th game of the Kaladesh campaign in the Story Mode.
http://magicduels.wikia.com/wiki/Kaladesh:_Mission_5

You know, it would have made this a lot easier if you had mentioned that relevant piece of information.

none had the "discard" effect.

You're looking for the wrong word.

• 701.8. Discard
  
  • 701.8a To discard a card, move it from its owner’s HAND to that player’s graveyard.
• 701.15. Sacrifice
  
  • 701.15a To sacrifice a permanent, its controller moves it from the BATTLEFILED directly to its owner’s graveyard. A player can’t sacrifice something that isn’t a permanent, or something that’s a permanent he or she doesn’t control. Sacrificing a permanent doesn’t destroy it, so regeneration or other effects that replace destruction can’t affect this action.

And, the AI's deck does include Syndicate Trafficker.

• {1}, SACRIFICE an artifact: Put a +1/+1 counter on Syndicate Trafficker. It gains indestructible until end of turn.

[seriaon]

Originally posted by Airaneon:

Originally posted by seriaon:

Just post a screenshot so we can assess the situation. What you descriped is not possible and therefore inforamtion is missing.

Found the card, it was Marionette Master. I apologize in advance for any grammar mistakes, english is not my mother language. The enemy had 2 Marionette Master ( 1 created 3 artifacts and 1 had 3x +1/+1 effect on it) a Chief of the Foundry and a Skysovereign, Consul Flagship. So, the enemy attack me with all the card except Skysovereign, Consul Flagship, and I blocked Chief of the Foundry cuz it was anoying as f***. I took the damage from the other cards and got the damage from Marionette Master's effect cuz I destroyed Chief and Artifact creature, but after that all the 1/1 monsters created by one of the MM started dying one after the other and I was piling up the damage from the MM effects because of that. And I was like "WTF is happening" enhanced the size of all the cards in the field and none had the "discard" effect. So I thought that the bot was simply discarding them to trigger the effect.

What you were looking for ins an ability that stated "sacrifice target creature/artifact/permanent ..." on a permament on his battlefield or his graveyard, if it is something like sacrifice to return to hand/battlefield. What also would have worked is an effekt like "deal 1 damage to target creature.". Or, but I never saw the opponent cast that card:
Eliminate the Competition (http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=417651) which states: as additional cost sacrifice creatures. If it was eliminate the competition he would sac the creatures to the spell before putting it onto the stack and you would die from the marionat masters without ever seeing it. In Paper magic you would have to reval the card and tell that you now are paing it's costs. So that you can't just say you have it in hand and sac creatures whenever you want.

[pjfeigel]

Originally posted by seriaon:

If it was eliminate the competition he would sac the creatures to the spell before putting it onto the stack and you would die from the marionat masters without ever seeing it.

Wrong.

Announcing the Spell and moving it to the Stack is the FIRST action in Casting a Spell.
Paying the Cost of the Spell is the LAST action in Casting a Spell.

• 601.2. To cast a spell is to take it from where it is (usually the hand), put it on the stack, and pay its costs, so that it will eventually resolve and have its effect. Casting a spell includes proposal of the spell (rules 601.2a–d) and determination and payment of costs (rules 601.2f–h). To cast a spell, a player follows the steps listed below, in order. [...]
  
  • 601.2a To propose the casting of a spell, a player first moves that card (or that copy of a card) from where it is to the stack. It becomes the topmost object on the stack. It has all the characteristics of the card (or the copy of a card) associated with it, and that player becomes its controller. The spell remains on the stack until it’s countered, it resolves, or an effect moves it elsewhere.
    [...]
    
  • 601.2h The player pays the total cost in any order. Partial payments are not allowed. Unpayable costs can’t be paid.

[seriaon]

Originally posted by pjfeigel:

Originally posted by seriaon:

If it was eliminate the competition he would sac the creatures to the spell before putting it onto the stack and you would die from the marionat masters without ever seeing it.

Wrong.

Announcing the Spell and moving it to the Stack is the FIRST action in Casting a Spell.
Paying the Cost of the Spell is the LAST action in Casting a Spell.

• 601.2. To cast a spell is to take it from where it is (usually the hand), put it on the stack, and pay its costs, so that it will eventually resolve and have its effect. Casting a spell includes proposal of the spell (rules 601.2a–d) and determination and payment of costs (rules 601.2f–h). To cast a spell, a player follows the steps listed below, in order. [...]
  
  • 601.2a To propose the casting of a spell, a player first moves that card (or that copy of a card) from where it is to the stack. It becomes the topmost object on the stack. It has all the characteristics of the card (or the copy of a card) associated with it, and that player becomes its controller. The spell remains on the stack until it’s countered, it resolves, or an effect moves it elsewhere.
    [...]
    
  • 601.2h The player pays the total cost in any order. Partial payments are not allowed. Unpayable costs can’t be paid.

Right, you can only 'pay' mana in adwance but pulling it into the mana pool and using it from there, mixed that up, sorry.