Kenrith, the Returned King + Smothering Tithe + Doubling Season + Bard, King of Dale

Kenrith, the Returned King

Smothering Tithe

Doubling Season

Bard, King of Dale

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 Bard.
3. Activate the Treasures by tapping and sacrificing them, adding 3.
4. Repeat.

This clever loop uses Kenrith, the Returned King's blue activation to force an opponent to draw a card, which immediately triggers Smothering Tithe. Normally that would just pay for itself, but Doubling Season and Bard, King of Dale team up as powerful replacement effects to multiply the resulting Treasure tokens exponentially. Because you generate more mana from those doubled Treasures than Kenrith's ability costs to activate, you can repeat the process indefinitely to bury your opponents in endless cards and sacrifice triggers.