Estra, Destiny Wielder

+1: Add to your mana pool one mana of any color a permanent an opponent controls could produce.
-2: Copy target instant or sorcery spell. You may choose new targets for the copy. You may activate this ability any time you could cast an instant.
-4: Exile an instant or sorcery card from each players graveyard. Copy those cards. Cast the copies if able without paying their mana costs.