Hmm, Soul Warden for EtG. Not a bad idea, although I feel like the unupped is UP. 1 life in EtG is not very valuable, especially in an element with lots of healing and when there is a cap on your HP. It's also a bit redundant with Empathic Bond but less focused and less healing. The upped creature is not easy to kill and 3 HP is more significant. Personally, I think it would be unique and neater if it increased your Max HP by 1|2 instead of your Current HP.Also, why not call it Throne Angel | Cherub Angel instead?
Except when combined with FFQ, Pharaoh, Fractal, Mitosis, Hourglass, or Golden Nymph. Oh, or Aflatoxin -- thats HUGE. Also, keep in mind that it triggers off of all creatures -- yours and your opponents.