Mucky

Flying, trample
Whenever Mucky deals combat damage to
a player, if that player attacked you during
his or her last turn, exile taraget
nonland permanent that player controls.
Violent tripping 13 - (At the beginning
of combat on your turn, if you control 13
LSD counters, you may return target
Max card from your graveyard to your hand.)
Who is the alpha?