Tromell, Seymour's Butler + Pentad Prism + Staff of Domination
Tromell, Seymour's Butler
Pentad Prism
Staff of Domination
Infinite colored manaInfinite lifegain triggersInfinite lifegainInfinite card drawInfinite untap of creatures you controlInfinite draw triggersInfinite mana creatures you control can produceInfinite proliferateInfinite charge counters on a permanent
How it works
Activate Tromell by paying 1 and tapping it, causing you to put at least six charge counters on Pentad Prism.
Activate Pentad Prism six times by removing six charge counters from it, adding six mana of any color(s).
Activate Staff of Domination's third ability by paying 3, untapping Tromell.
Activate Staff of Domination's first ability by paying 1, untapping it.