Dumbledore, Headmaster

Prowess, Prowess, Hexproof.
Instant and Sorcery spells cost you {1} less to cast.
When Dumbledore, Headmaster enters the battlefield, if you casted two or more signature
spells, return target instant or sorcery spell from
your graveyard to your hand. If you casted four or
more, you may cast that spell without paying it's
mana cost.