Enchanted Evening, and Opalescence

Prerequisites

• Enchanted Evening on the battlefield
• Opalescence on the battlefield

Steps

1. All permanents become enchantment creatures with power and toughness equal to their mana value
2. All permanents with a mana value of zero will be destroyed due to having zero toughness

Results

• Destroy all permanents with a mana value of zero
• Permanents with a mana value of zero are destroyed upon ETB