Imoti, Celebrant of Bounty (Multiverse Legends 43) - Uncommon Magic: The Gathering Card

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)
Spells you cast with mana value 6 or greater have cascade.