Chandra, the Firestorm

+1: Target player gets an emblem with "whenever you cast an instant or sorcery spell, this emblem deals 1 damage to you."
-3: Chandra, the Firestorm deals 3 damage to target player, and 1 damage to each of up to 3 target creatures.
-7: Target player gets an emblem with "whenever a creature attacks or whenever a player casts a spell, this emblem deals 1 damage to you."