Noa, Roar of the World

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