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.