Oblivion Ring | Detention Sphere | Archon of Sun's Grace

(and one other card)

Cast
Copy Enchantment by paying ({2} magic symbol) ({U} magic symbol) , causing it to enter the battlefield as a copy of
Oblivion Ring.
When
Copy Enchantment enters the battlefield, its first ability and
Archon of Sun's Grace trigger.
Resolve the
Archon of Sun's Grace trigger, creating a 2/2 Pegasus creature token.
Resolve the
Copy Enchantment trigger, exiling
Oblivion Ring.
When
Oblivion Ring leaves the battlefield, its second ability triggers, returning
Detention Sphere from exile to the battlefield.
When
Detention Sphere enters the battlefield, its first ability and
Archon of Sun's Grace trigger.
Resolve the
Archon of Sun's Grace trigger, creating a 2/2 Pegasus creature token.
Resolve the
Detention Sphere trigger, exiling
Copy Enchantment.
When
Copy Enchantment leaves the battlefield, its second ability triggers, returning
Oblivion Ring from exile to the battlefield.
When
Oblivion Ring enters the battlefield, its first ability and
Archon of Sun's Grace trigger.
Resolve the
Archon of Sun's Grace trigger, creating a 2/2 Pegasus creature token.
Resolve the
Oblivion Ring trigger, exiling
Detention Sphere.
When
Detention Sphere leaves the battlefield, its second ability triggers, returning
Copy Enchantment from exile to the battlefield as a copy of
Oblivion Ring.
Repeat from step 2.