Centaur and whetstone does nothing?

[Uromysitisis]

If you roll a 5-6 he joins you as a follower. In our game last night his ability did not do anything once he joined. Also the whetstone is supposed to add +1 when using a weapon but did not. Anyone else experience these?

[s54113]

Centaur
Roll 1 die to determine how the Centaur reacts to you:
1-2) Attacks you; lose 1 life
3-4) Ignores you
5-6) Joins you as a Follower; you MAY discard any Enemy you are about to encounter. The Centaur will then canter off to the discard pile.

His ability won't do anything if you won't use it.

Whetstone
Add 1 to your Strength in battle if you are using a Weapon.

In usable cards tab too. Devs' choice, I guess.

[Uromysitisis]

Okay, i’ll look again next time. But saw no trace of any highlighted cards that could be used. But there are plenty of phases during a battle so maybe I missed something

[WingedKagouti]

To use Whetstone you have to use a weapon and you need to activate it before dice are rolled.

[New Moon On Monday]

I did have a game in which I was able to use a Whetstone once, but after that it became unavailable to use even though I still possessed it. I acquired it as a reward from winning a battle against another character on the Crown of Command. I was able to use the Whetstone in the next battle, but for each battle after that, it remained unselectable.

I had one other case where a selectable item stopped working after using it once in the Crown of Command- it was the book that allows taking two turns on the Crown of Command. The first time I tried to use it, I clicked it after ending my turn, and then it was unselectable the rest of the game. (In later games, when I have that item, I have been careful to wait to click it as my last act before ending my turn, and that seems to work fine.)