Wendell, Trickster Alchemist

Whenever Wendell, Trickster Alchemist deals
combat damage to a player or a permanent, put
a detonation counter on that target.
{u}{r}, {t}: Remove all detonation counters from
target player or permanent. Wendell deals
3 damage to it for each counter that was
removed this way.
"I believe that my next move will truly blow
your mind."