The Master, Formed Anew | Ruthless Technomancer | Mirrorhall Mimic // Ghastly Mimicry

(and one other card)

The Master in hand.
Ruthless Technomancer in exile (with a takeover counter on it).
Mirrorhall Mimic // Ghastly Mimicry and
Agatha of the Vile Cauldron on the battlefield.

Mirrorhall Mimic // Ghastly Mimicry and
Agatha of the Vile Cauldron each have a power of at least 2.

Cast
The Master by paying ({U} magic symbol) ({B} magic symbol) .
When
The Master enters the battlefield, it triggers, causing you to sacrifice
Mirrorhall Mimic // Ghastly Mimicry and create at least two Treasure tokens.
Activate a Treasure by tapping and sacrificing it, adding ({B} magic symbol) .
Activate
The Master by paying ({B} magic symbol) and sacrificing a Treasure, returning
Mirrorhall Mimic // Ghastly Mimicry from your graveyard to the battlefield as a copy of
The Master, which causes the
Mirrorhall Mimic // Ghastly Mimicry to be a copy of
Ruthless Technomancer.
When
Mirrorhall Mimic // Ghastly Mimicry enters the battlefield, it triggers, causing you to sacrifice
The Master and create two Treasure tokens.
Activate a Treasure by tapping and sacrificing it, adding ({B} magic symbol) .
Activate
Mirrorhall Mimic // Ghastly Mimicry by paying ({B} magic symbol) and sacrificing a Treasure, returning
The Master from your graveyard to the battlefield as a copy of
Ruthless Technomancer.
Repeat from step 2.