Fludge, Gunk Guardian
Legendary Creature — Slug Ooze5/5$0.21
Whenever Fludge, Gunk Guardian or another Slug, Ooze, Fungus, or Mutant enters the battlefield under your control, each opponent shuffles three Gunk cards into their library. (Gunk is a colorless sorcery card with no mana cost that has cycling .)
Not legal in Commander