Oblivion Ring, Detention Sphere, Archon of Sun's Grace, and Copy Enchantment

Prerequisites

• Oblivion Ring on the battlefield
• Detention Sphere in exile
• Archon of Sun's Grace on the battlefield
• Copy Enchantment in hand
• available

Steps

1. Cast Copy Enchantment by paying , causing it to enter the battlefield as a copy of Oblivion Ring
2. When Copy Enchantment enters the battlefield, its first ability and Archon of Sun's Grace trigger
3. Resolve the Archon of Sun's Grace trigger, creating a 2/2 Pegasus creature token
4. Resolve the Copy Enchantment trigger, exiling Oblivion Ring
5. When Oblivion Ring leaves the battlefield, its second ability triggers, returning Detention Sphere from exile to the battlefield
6. When Detention Sphere enters the battlefield, its first ability and Archon of Sun's Grace trigger
7. Resolve the Archon of Sun's Grace trigger, creating a 2/2 Pegasus creature token
8. Resolve the Detention Sphere trigger, exiling Copy Enchantment
9. When Copy Enchantment leaves the battlefield, its second ability triggers, returning Oblivion Ring from exile to the battlefield
10. When Oblivion Ring enters the battlefield, its first ability and Archon of Sun's Grace trigger
11. Resolve the Archon of Sun's Grace trigger, creating a 2/2 Pegasus creature token
12. Resolve the Oblivion Ring trigger, exiling Detention Sphere
13. When Detention Sphere leaves the battlefield, its second ability triggers, returning Copy Enchantment from exile to the battlefield as a copy of Oblivion Ring
14. Repeat from step 2

Results

• Infinite creature tokens
• Infinite ETB