Ruthless Technomancer in exile (with a takeover counter on it).
The Master in hand or in the command zone.
Undercover Operative and Training Grounds on the battlefield.
Undercover Operative has a power of at least 2.
({U} magic symbol) ({B} magic symbol) plus enough mana to pay for commander tax, if applicable available.
Steps
Cast The Master either from your hand or from the command zone by paying ({U} magic symbol) ({B} magic symbol) plus command tax, if applicable, choosing to have it enter the battlefield as a copy of Ruthless Technomancer.
When The Master enters the battlefield, it triggers, causing you to sacrifice Undercover Operative 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 Undercover Operative from your graveyard to the battlefield as a copy of The Master, which causes the Undercover Operative to be a copy of Ruthless Technomancer.
When Undercover Operative 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 Undercover Operative by paying ({B} magic symbol) and sacrificing a Treasure, returning The Master from your graveyard to the battlefield as a copy of Ruthless Technomancer.