Clip Wings says you have to sacrifice a creature with flying. Assume the opponent has a non-flying creature (Rancid Rats for example) enchanted with Gryff's Boon (creature gains flying). Will Clip Wings kill the enchanted creature (Rancid Rats in this example)?
2 Answers
Yes. A "creature with flying" is any creature that currently has the ability "flying" for any reason - whether its own card text, an enchantment, or even a temporary source like Aerial Maneuver which grants flying until end of turn.
Depends. Clip Wings says each of your opponents has to sacrifice a creature with flying. As long as that enchanted Rancid Rats is his only flying creature then yes it will have to be sacrificed. If he has other creatures with flying then he could sacrifice one of those instead.