Imperial Fist Devestater

Loyalty (Whenever another Adeptus Astartes enters
the battlefield, you may either put a +1/+1 counter on
target creature you control, or you may gain 3 life.)
{x}{x}{x}{w}{r}, {t} :
You gain {x} power cell counters.
{x}, Pay {x} power cell counters : Deal half {x}
damage to target permanent
"Death to the enemies of the Imperium!"