Ring of Spell Storing

Equip {3}
Equipped creature has "Whenever you cast an
instant or sorcery spell, you may attach it to this
creature after the stack resolves. You may cast
any spells attached to this creature through this
creature, they can't be countered. You can only
have up to three spells attached to this creature
this way. You may put a spell attached to this
creature into your graveyard at any time."