Valiant Exo-Soldier, Mecha

Trample
When Valiant Exo-Soldier enters the battlefield, create a 3/3 colorless Mech artifact creature token with "This creature has trample and can't be blocked by creatures with power 2 or less."
Whenever Valiant Exo-Soldier attacks, you may sacrifice a Mech token. If you do, Valiant Exo-Soldier gains +X/+X until end of turn, where X is the sacrificed creature's power.

"Behind the visor lies a warrior whose power is matched only by the destruction he leaves in his wake."