Composer of Spring + Cloudstone Curio

Cast the enchantment creature by paying its mana cost.

When the enchantment creature enters the battlefield, Cloudstone Curio and Composer of Spring trigger.

Resolve the Cloudstone Curio trigger, returning another nontoken enchantment creature to your hand from the battlefield.

Resolve the Composer of Spring trigger, putting an enchantment creature from your hand onto the battlefield.

Repeat from step 2.