Isla, the Firecracker

If an instant or sorcery you control would deal damage to
an opponent or a permanent an opponent controls, it deals that much damage plus 1 instead.

{w}{r}{t}: Isla, the Firecracker deals X damage spread amongst any number of creatures, where X
is the number of sorceries and instants in your graveyard.

Come and dance now, Fircracker!
Stomp your feet to the rhythm!