Miirym, Sentinel Wyrm + Cloudstone Curio + Dracogenesis + Dragon Creature

Prerequisites

• Dragon Creature

Steps

1. 1Cast the Dragon in your hand without paying its mana cost.
2. 2When the Dragon enters the battlefield, Cloudstone Curio triggers if the Dragon isn't an artifact and Miirym triggers.
3. 3Resolve the Cloudstone Curio trigger, if applicable, choosing to return nothing.
4. 4Resolve the Miirym trigger, creating a token copy of the Dragon that isn't legendary if the Dragon was legendary.
5. 5When the Dragon token enters the battlefield, Cloudstone Curio triggers, returning the Dragon cast in step 1 from the battlefield to your hand.
6. 6Repeat.

Effects

• Infinite copies of most nontoken Dragons you control
• Infinite creature tokens
• Infinite ETB
• Infinite LTB
• Infinite storm count