Rok-Tahk, Budding Scientist

Creatures you control have "{T}: Add {G}{G}." When Rok-Tahk enters, create Murf, a legendary 0/1 green Ooze Slug creature token with indestructible.

"You have to expect the unexpected in my field. Because before the right answer, we often find the wrong one. But the wrong one can lead us to entirely new discoveries."