Hi everybody, I'm quite new to the CoC cardgame but I manage to understand the main rules (mostly).

Another day I was playing a game with my friend and he had a feathered serpent in play. This card says that he can change one of its terror icons for an combat and arcane icon. Our doubt came from the fact that this is a free action and the serpent has 3 terrors, so can it use as much as it want or just once?

There is also the Brood of Yig which is similar, you pay 1 to change one of its terrors to a combat (it has 2 terrors). Does being an ability with cost changes something?

The only limit to the number of times you can trigger these abilities are #1 the number of Terror icons and or #2 the number of ready domains with at least 1 resource attached.

Wow, so this feathered serpent is a very good card!

Thank you for the help!