Apollo, Roar of the World

Eminence — At the beginning of combat on your turn, if Apollo,Roar of the World 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.