Infinite black manaInfinite lifegain triggersInfinite lifegainInfinite card drawInfinite untap of creatures you controlInfinite draw triggersInfinite mana creatures you control can produce
How it works
Pay 2 to activate Magus of the Coffers, adding at least seven .
Pay 3 to activate Staff of Domination's third ability, untapping Magus of the Coffers.
Pay 1 to activate Staff of Domination's first ability, untapping itself.
Repeatedly tap the Magus for mana and untap it, generating at least per iteration.