Myr Welder + Staff of Domination + White Lotus Tile
Myr Welder
Staff of Domination
White Lotus Tile
Infinite colored manaInfinite lifegain triggersInfinite lifegainInfinite card drawInfinite untap of creatures you controlInfinite draw triggersInfinite mana creatures you control can produce
How it works
Activate Myr Welder using White Lotus Tile's ability by tapping it, adding at least two mana of any color.
If Staff of Domination is on the battlefield, activate its third ability by paying 3, untapping Myr Welder. Then, activate Staff of Domination's first ability by paying 1. untapping it.
If Staff of Domination is exiled by Myr Welder, activate Myr Welder using Staff of Domination's first ability by paying 1, untapping Myr Welder.
Repeat.
By leveraging Myr Welder's ability to absorb the activated powers of artifacts in your graveyard, you can turn this construct into an absolute engine. Once White Lotus Tile and Staff of Domination find their way into the graveyard, Myr Welder gains the mana-producing capabilities of the former and the untap mechanics of the latter. This creates a closed loop where the mana generated by the White Lotus Tile's imprint easily pays for the Staff of Domination's untap costs, letting you endlessly cycle abilities to produce infinite mana, life, and card draw.