Morpheus

Whenever a player casts a creature spell, that player chooses the blue pill or the red pill. If they choose the blue pill, shuffle that creature into their library and they draw two cards. If they choose the red pill, that creature enters the battlefield tapped with a +1/+1 counter on it.
"You take the blue pill, the story ends, you wake up in your bed and believe whatever you want to believe. You take the red pill, you stay in wonderland and I show you how deep the rabbit-hole goes."