Ares, Roar of the World

Eminence-at the beginning of combat on
your turn, if Ares, 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.