Ciri, Lady of Time & Space

Trample, Hexproof

Whenever Ciri, Lady of Time & Space deals combat damage to a player, as you cast spells from your
hand this turn, they gain cascade.
(When you cast the 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 of your library in any order.)