USS. Li'l Sandy, Idol Mascot

Trample
When USS. San Diego, Li'l Sandy enters the battlefield, put X +1/+1 counters on it, where X
is the number of other creatures you control.
Whenever USS. San Diego, Li'l Sandy attacks,
other attacking creatures you control get +X/+X
until the beginning of the next end step, where X
is the number of +1/+1 counters on
USS. San Diego, Li'l Sandy.