Zweii, Who Worships Muscle

Vigilance, Double Strike, Reach
{3}, {t}: Target tapped creature becomes swole.
(Put 10 +1/+1 counters on it. You can only make a creature swole if it has at least 3, but less than 10
+1/+1 counters on it.)
At the beginning of each end step, put a +1/+1 counter on each Zweii you control.
"It's gainz o'clock, brother."