Requires

Oblivion Ring must be on the battlefield. Detention Sphere must be in exile (exiled by Oblivion Ring). Archon of Sun's Grace must be on the battlefield. Copy Enchantment must be in hand. Mana needed:

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