Kenrith, the Returned King + Smothering Tithe + Parallel Lives + Doubling Season

Kenrith, the Returned King

Smothering Tithe

Parallel Lives

Doubling Season

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 Doubling Season and Parallel Lives.
3. Activate the Treasures by tapping and sacrificing them, adding 3.
4. Repeat.

This ingenious engine turns Kenrith, the Returned King's blue draw ability into a self-sustaining fountain of mana by leveraging the persistent tax of Smothering Tithe. Because Doubling Season and Parallel Lives both double the token output, a single refused draw transforms into four precious Treasure tokens instead of one. Sacrificing just three of those Treasures easily pays the exact {3}{U} needed to activate Kenrith, the Returned King again, leaving you with an accumulating surplus of mana and triggers.