Big Chandra (the one that makes emblems on her +)
Inferno Titan
Form of the Dragon
Big Niv-Mizzy
Any good Bolas
Wildfire
Captive Audience
That Izzet burn spell that burns X and you draw X
Kaldra Compleat maybe
Big Karns
Eldrazi Titans
and dont forget irencrag feat so you can go even further beyond
Greater Shriekmaw 4B
Enchantment Creature - Elemental
Menace
When this ETB, destroy target creature. Its controller loses 3 life.
Evoke 1B
3/2
sidegrade to the new dalek that is also a shriekmaw reference