Rampaging Minotaurs

Trample
Stampede — Whenever this creature attacks with
two or more creatures that share a color with this
one, attacking creatures you control get +X/+X
and gain trample until end of turn where X is the
number of attacking creatures you control.
"You mess with the bull, you get the horns. You don't
want to know what happens when you mess with minotaurs."