Orochimaru, Akatsuki

Mutate {5}, Flanking, Menace, Reach, Flash
{c}{c}: Regenerate Orochimaru, Akatsuki
{x}{x}: Create X X/X colorless Snake
creature tokens.
When this creature enters the graveyard if you
cast it for its mutate cost you may return it from
your graveyard to the battlefield.