Arahbo, Roar of the World

Eminence—At the beginning of combat on
your turn, if Arahbo, 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.