Spherling Dervish

Momentum (During your endstep each turn, put a
+1/+1 counter on this creature)
During your upkeep, if Spherling Dervish has
three or more +1/+1 counters on it, sacrifice
it. It deals damage equal to its power to any
target.
—
'The rolling ball gathers no mess(i)' - Rodrigo