Another angle is to play with some of those suspend cards with no mana cost, like Ancestral Vision, Crashing Footfalls, Resurgent Belief, Lotus Bloom, or Mox Tantalite, and get a zero-mana creature in the graveyard for Ellie and Alan to discover them with
But as a singleton after an attrition battle
Now you've got a flier that can do the trick, or Radiant Fountain or Obscura Storefront or a crazy turn 1 foreshadow of Leechridden Swamp #37
Ashling, Flame Dancer Eliana: I really dont like playing with red in EDH, but dang do they have some spice in this set
The damaged creature will be exiled if it would die for any reason that turn, not just if it dies due to damage from Incendiary Flow
The catch here is that you can just float a ton of mana, resolve Upheaval, then use what mana you have left to deploy mana rocks and threats