Lathliss, Dragon Queen + Cloudstone Curio + Arcane Adaptation + Kobolds of Kher Keep

Lathliss, Dragon Queen

Cloudstone Curio

Arcane Adaptation

Kobolds of Kher Keep

How it works

1. Cast Kobolds of Kher Keep by paying 0.
2. When Kobolds of Kher Keep enters the battlefield, Lathliss and Cloudstone Curio triggers.
3. Resolve the Cloudstone Curio trigger, returning nothing to your hand.
4. Resolve the Lathliss trigger, creating a 5/5 Dragon creature token.
5. When the Dragon enters the battlefield, Cloudstone Curio triggers, returning Kobolds of Kher Keep from the battlefield to your hand.
6. Repeat.