Felicia, Darkstalker

Eminence — At the beginning of combat on your turn, if Felicia is in the command zone or on the battlefield, another target Cat you control gets +3/+3 until end of turn. Whenever another Cat you control attacks, you may pay {1}{g}{w}. If you do, it gains trample and gets +X/+X until end of turn, where X is its power.