Glacial Chasm + Perennial Behemoth + Rites of Flourishing

Glacial Chasm

Perennial Behemoth

Rites of Flourishing

How it works

1. Play Glacial Chasm either from your hand or from your graveyard.
2. When Glacial Chasm enters the battlefield, its second ability triggers, causing you to sacrifice another land you control.
3. Play any land from your graveyard.
4. At the beginning of your next upkeep, Glacial Chasm's cumulative upkeep ability triggers, allowing you to choose not to pay the cost and sacrifice it instead.
5. Repeat.

This clever lock completely shields you from all harm by cycling Glacial Chasm in and out of play, letting you dodge its painful cumulative upkeep cost entirely. Rites of Flourishing provides the extra land drop you need to replay the sacrificed land each turn, while Perennial Behemoth allows you to pull that land right back out of your graveyard to keep the cycle spinning endlessly.