Ive started to come around on Rhonas the Indomitable, the only God to make my list
Most of them have relatively weak stats and aren't that exciting other than provide new methods to hand out poison counters
To hit Twilight Sparkle's win condition, you'll need to search for a couple of other Ponies
Additionally, whenever Umbris or another nightmare or horror enters the battlefield under its owner's control, target opponent exiles cards from the top of their library until they exile a land
and lastly Oracle of Bones, to potentially cheat in an instant or sorcery, like Deathbellow War Cry
Ascendant Spirit is a great early game drop, but its level-up-style abilities make it a great drop for when you have enough mana to dump on it as soon as it hits the field