Did I miss any glaringly obvious choices
Destroy target player, whoa
But cascading also works with exile-matters types
This strategy has a little added twinkle in FIN, with both The Emperor of Palamecia and Shantotto, Tactician Magician giving you added bonuses if you spend 4 or more mana to cast your noncreature spells
Not only do you get +2/+2 and protection from two colors, but you also gain two powerful abilities on the attack, and they will untap your lands, Raise Dead a creature, Shock something, and so forth
Channeler will have to attack every turn once Delirious, but this isnt much of an issue for tempo decks like Legacy Izzet Delver that are trying to end the game relatively fast