Takahashi, Shadow Sorcerer

First strike, intimidate (This creature can't be
blocked except by artifact creatures and/or creatures
that share a color with it.)

{6}{u/b}{u/b}: Each opponent may sacrifice a creature.
If they don't, you get an emblem with "At the
beginning or your end step, draw a card." Then
if you control three or more of these emblems,
sacrifice them and transform Takahashi, Shadow
Sorcerer.