Animate Spell — Mystery Booster Playtest Cards 2019 #16

Flash

Enchant instant or sorcery spell on the stack

When Animate Spell becomes attached to an instant or sorcery, put that card onto the battlefield under its owner's control. It's a creature in addition to its other types with power and toughness each equal to its converted mana cost.

When Animate Spell leaves the battlefield, enchanted card's owner sacrifices it unless they cast it.