Activate Brigid by tapping it, adding at least {G}{G}{G}{G}{G} or {W}{W}{W}{W}{W}
Activate Staff of Domination's third ability by paying {3}, untapping Brigid.
Activate Staff of Domination's first ability by paying {1}, untapping it.
Repeat.

Infinite card draw

Infinite draw triggers

Infinite green mana

Infinite lifegain

Infinite lifegain triggers

Infinite mana creatures you control can produce

Infinite untap of creatures you control

Infinite white mana

Staff of Domination

Brigid, Clachan's Heart // Brigid, Doun's Mind

Activate Ashnod's Altar by sacrificing Brigid, adding {C}{C}.
When Brigid dies, Nim Deathmantle triggers, causing you to pay {4} to return Brigid from your graveyard to the battlefield and attach Nim Deathmantle to it.
When Brigid enters, it triggers, creating a creature token.
Activate Ashnod's Altar by sacrificing a creature token, adding {C}{C}.
Repeat.

Infinite ETB

Infinite LTB

Infinite death triggers

Infinite sacrifice triggers

Nim Deathmantle

Ashnod's Altar

Cause Brigid to become an artifact using Liquimetal Torque
Activate Brigid by tapping it, adding at least {G}{G}{G} or {W}{W}{W}.
Activate Voltaic Construct by paying {2}, untapping Brigid.
Repeat from step 2.

Infinite untap of artifact creatures you control

Voltaic Construct

Liquimetal Torque

Activate Brigid, Clachan's Heart // Brigid, Doun's Mind by tapping it, adding at least {G}{G}{G}{G}{G} or {W}{W}{W}{W}{W}
Activate Chrome Dome by paying {5}, creating a token copy of Sewer-veillance Cam.
When the Sewer-veillance Cam token enters, it triggers, untapping Brigid, Clachan's Heart // Brigid, Doun's Mind.
Repeat.

Infinite copies of artifacts you control with haste

Infinite creature tokens with haste

Chrome Dome

Sewer-veillance Cam

Combos with "Brigid, Clachan's Heart // Brigid, Doun's Mind"