Junko, Arbitor of All

Investigate X times. (create a Clue token. It's an artifact with "{2}Sacrifice this artifact: draw a card.")
When Junko, Aribtor of All enters the battlefield all
clue tokens can be sacrificed without paying the
mana cost. If 5 or more clue tokens are sacrificed
this turn, you have no minimum hand size for the
rest of the game.
"The 3 am wizard. The golden god. He who
knows best."