Flying

Magecraft - Whenever you cast or copy an instant or sorcery spell, you may pay life equal to the spell's mana value. If you do, it gains cascade.

When Kairos Fateweaver enters the battlefield, you may cast target instant or sorcery spell with mana value 5 or less from your graveyard without paying its cost. If it would enter a graveyard this turn, exile it instead.