There are many ways to abuse this, but it's one of the best examples of what I call my WALD theory that puts game-changing cards into three categories: Wrath of God - These are massive cards that you cast when you are behind, and then they bring you back to a neutral state, just like Wrath of God does when you are losing the creature battle
Its best when paired with cards like Falco Spara, Pactweaver or Good-Fortune Unicorn that can let you persist it over and over
Hipparion is a now-extinct genus of horse
Denethor, Ruling Steward Denethor, Ruling Steward is an aristocrats commander that continues to create more creatures to sacrifice each turn
We ultimately decided to drop it for simplicity, instead using 1/1 Hero tokens
Aethersquall Ancient: [Category 3] ETB yield is 3 Energy for 7 mana, then you can spend 8 Energy to return all other creatures to hand