Aerith, Last Ancient offers a lifegain payoff you will almost never pull off in an actual game because aside from Sephiroth, Fallen Hero or Wrecking Ball Arm there's no other way to reliably get her to 7 power and very little lifegain in the deck otherwise
One interesting partner is pirate commander Malcolm, Keen-Eyed Navigator, seeing as its Treasure-making abilities are amplified
Of course, we also know about Snow White that she likes to literally make wishes in wells
You might run it for the back side of the card more than the front in that format
The characters five-health stat will also make it more difficult for players to take it down in a challenge, with a lot of the smaller damage actions and song cards - like Let the Storm Rage On - not quite taking the card out
Table of Contents show What Are Bird Commanders in MTG