This engine relies on the incredible synergy between Selvala, Heart of the Wilds, Hullbreaker Horror, and any cheap creature. By using Selvala's tap ability to generate a surplus of mana, you can cast a creature to trigger Hullbreaker Horror, whose cast trigger bounces Selvala back to your hand. Recasting Selvala then triggers the Horror *again*, bouncing your original creature right back to your hand so the loop can start anew. Kratos, God of War rounds out the board by granting all creatures haste, though the true power of the loop lies in the endless cycle of casting and bouncing your threats to generate infinite mana, storm count, and creature triggers.