Book of Fire/Ice mechanics

[Sir Gladstone]

I just noticed Book of fire and Book of ice proc damage depends on the level of your fireball/ice bolt spell cards. Do I have to equip these cards, or just have them leveled?

[Scase is KING of Narwhals]

Just leveled.

[Evilsod]

To add to the above, it's the same effect as the Rogues abilities which fire special arrows. They gain the damage of ones which are in your pack too, so things like Elemental Sisters (Leg. Decoy) which makes 3 decoys who each fire an elemental arrow become stupidly powerful when you have fully upgraded set of Fire/Ice/Poison Arrows.

[Psojed]

The books are more akin to the Rogue's Quiver (% chance that your normal attack will be changed into a special attack instead).

However, unlike the Quiver which also provides shockwave damage, the books of fire/ice feel really bad. I mean, if I can keep shooting fire/ice bolts 100% of the time, why would I ever use a book with only 30% chance of shooting those bolts?

[Shao]

My first legendary was the Ice Book and i found the Ice Bolt pretty late in my Run.
So thats when you use the Book most of the time.

But right now in Massacre there is no Slot for a Card like Books of Ice/Fire.

[eliotno3]

Found & equipped both books together early on in a recent hardcore mage run. Was an elemental glass cannon of death for a short while til RIP... slowing mobs from freeze to watch 'em burn in circles of flame, all from regular shots, was very cool.

[zverozvero]

Speaking about both books at a time, how does those 50% on teleport and orb work? I read that golem punch should concider heart type of mob if those are of fire or ice.
But if i get it right splash or in particular Orb cant asume target and 50+50 should guarantee no elementless attacks but still normal orbs and splashes happen and fairly often.
Is it 50% on stack from first book equiped and if it dont proc second book gets chance to roll its dice? Feels like mix of those on basic attack too as if it chooses 'right' element and roll its 0.4 and then has 0.4 of unrolled to get off element.
I can get behind 40% of getting good normal attack and 24% to get complete fizzle but for orbs and splashes seeing nonelementals after spending 2 slots sololy for enchancements is fairly disheartening. Wish nonelemental mobs got those 80% chance to get speciall bolt instead of 66% if what my guesss is correct...

[eliotno3]

I never had a golem so no idea there mate. As far as the orb from the robe goes however, I imagine it's same as a proc effect from any roguetype... check for which type (fire/ice) 1st then check %chance for the other on fail. Or phaps it's checked by the slot order you place the book in your inventory? Haven't checked that possibility!

[zverozvero]

Thanks. Suspicions that i miss something in plain sight floating up every now and then is quite annoying. Good to have other people observations.