RulingRules Reference 1.8

Can Redwing’s ability be triggered if the top card of the encounter deck is visible and that card has no icons in its…

Question

Can Redwing’s ability be triggered if the top card of the encounter deck is visible and that card has no icons in its boost area?

No, because the player knows that the ability will not be able to affect its target, the ability cannot be triggered.

— Rules Reference 1.8