I know a lot of people are trying to find the best way to use Underworld Breach. I was thinking that this might be the missing piece to making a Jeskai Ascendancy deck work in legacy. They compliment each other quite well. Ascendancy loots every time you play a spell, which feeds the graveyard for escape costs. Most of the cards will be non-creature, non-land cards to fit the criteria. I imagine Faithless Looting and Careful Study would super-charge combo turns as well.

Just some thoughts. Does Underworld Breach make Jeskai Ascendancy a legitimate combo for legacy?