Staff of Domination to become an artifact creature until end of turn.
Activate
Grand Architect's first ability by paying ({U} magic symbol) , causing
Staff of Domination to become blue until end of turn.
Activate
Grand Architect's second ability by tapping
Staff of Domination, adding ({C} magic symbol) ({C} magic symbol) that can only be spent to cast artifact spells or to activate abilities of artifacts.
Activate
Staff of Domination's first ability by paying ({1} magic symbol) , untapping it.
Repeat from step 3.
Once you have infinite mana, you may instead tap
Staff of Domination using its other abilities if it does not have summoning sickness.
Results
Infinite card draw.
Infinite colorless mana that can only be spent to activate abilities of artifacts.
Infinite colorless mana that can only be spent to cast artifact spells.
Infinite draw triggers.
Infinite lifegain.
Infinite lifegain triggers.
Infinite mana creatures you control can produce.
Infinite untap of creatures you control.
Metadata
In 50 decks according to EDHREC.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).