Tsukiyama Umezawa

Hexproof, deathtouch, provoke (Whenever this creature attacks, you may have target creature
defending player controls untap and block it if able.)
Tsukiyama Umezawa can only attack alone.
Whenever a creature dealt damage by Tsukiyama Umezawa is put into a graveyard during your
combat phase, there's an additional combat phase
after this combat phase. At the beginning of that combat, untap Tsukiyama Umezawa.