The Gunky Runner (UNK-RB04) - Unknown Event

Ew-minance — When The Gunky Runner enters and at the beginning of the first upkeep in a game where it's your commander, shuffle three Gunk cards into each opponent's library. (Gunk is a colorless sorcery card with no mana cost and cycling {4}.)
Whenever an opponent loses life, they shuffle that many Gunk cards into their library.
Ready to run (You can have two commanders if both have ready to run.)