Summons, The Last Three

Whenever Summons, The Last Three enters the battlefield, search your library for an instant or sorcery and put it into your hand.
If you control Summons, The First Five, spells in your graveyard gains flashback.(You may cast cards from your graveyard for its flashback cost which is the same mana cost as its original cost. Then exile it.)
Bigbang in a bang. The ultimate summons gives you their blessing.