Composer of Spring, and Cloudstone Curio

Prerequisites

• Composer of Spring on the battlefield
• Cloudstone Curio on the battlefield
• You control six or more enchantments
• You control a nontoken enchantment creature
• You have an enchantment creature card in hand
• You have enough mana available to cast the enchantment creature in hand

Steps

1. Cast the enchantment creature by paying its mana cost
2. When the enchantment creature enters the battlefield, Cloudstone Curio and Composer of Spring trigger
3. Resolve the Cloudstone Curio trigger, returning another nontoken enchantment creature to your hand from the battlefield
4. Resolve the Composer of Spring trigger, putting an enchantment creature from your hand onto the battlefield
5. Repeat from step 2

Results

• Infinite ETB
• Infinite LTB