Clever Impersonator | Copy Enchantment | Oblivion Ring

(and one other card)

Clever Impersonator and
Copy Enchantment in hand.
Oblivion Ring and
Sage of Mysteries on the battlefield.
({4} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) available.

Cast
Copy Enchantment by paying ({2} magic symbol) ({U} magic symbol) .
Copy Enchantment enters the battlefield as a copy of
Oblivion Ring, triggering
Sage of Mysteries and itself.
Resolve the
Sage of Mysteries trigger, causing target player to mill two cards.
Resolve the
Copy Enchantment's trigger, exiling
Oblivion Ring until it leaves the battlefield.
Cast
Clever Impersonator by paying ({2} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Clever Impersonator enters the battlefield as a copy of
Copy Enchantment, triggering
Sage of Mysteries and itself.
Resolve the
Sage of Mysteries trigger, causing target player to mill two cards.
Resolve the
Clever Impersonator's trigger, exiling
Copy Enchantment until it leaves the battlefield.
Copy Enchantment leaves the battlefield, returning
Oblivion Ring from exile to the battlefield.
Sage of Mysteries and
Oblivion Ring trigger.
Resolve the
Sage of Mysteries trigger, causing target player to mill two cards.
Resolve the
Oblivion Ring's trigger, exiling
Clever Impersonator.
Clever Impersonator leaves the battlefield, returning
Copy Enchantment from exile to the battlefield.
Repeat from step 2.