Kenrith, the Returned King + Smothering Tithe + Adrix and Nev, Twincasters + Exalted Sunborn

Kenrith, the Returned King

Smothering Tithe

Adrix and Nev, Twincasters

Exalted Sunborn

How it works

1. Activate Kenrith's fourth ability by paying 3, causing an opponent who cannot pay for Smothering Tithe's trigger to draw a card.
2. Smothering Tithe triggers, causing you to create four Treasure tokens due to Adrix and Nev and Exalted Sunborn.
3. Activate the Treasures by tapping and sacrificing them, adding 3.
4. Repeat.

This engine turns Kenrith, the Returned King into a self-sustaining card-drawing and mana-generating machine by leaning heavily on Smothering Tithe. Because your opponents are forced to either let you amass a mountain of mana or let you keep drawing, you simply use the blue draw ability to force the issue. The real magic happens when Smothering Tithe's triggered ability resolves, because the replacement effects from both Adrix and Nev, Twincasters and Exalted Sunborn compound together to turn a single Treasure into an avalanche of four tokens instead. That windfall easily pays for the next activation of Kenrith, the Returned King, leaving you with an unstoppable loop of resources.