Ashaya, Soul of the Wild + Blossoming Tortoise + Karn, Silver Golem + Mycosynth Lattice

Ashaya, Soul of the Wild

Blossoming Tortoise

Karn, Silver Golem

Mycosynth Lattice

How it works

1. Acitvate Karn by paying 0 due to Blossoming Tortoise, causing a land an opponent controls to become a 0/0 artifact creature.
2. The land dies as a state-based action due to having 0 toughness.
3. Repeat.
4. You may also repeat this loop whenever a land enters the battlefield under an opponent's control, and you may repeat this for any permanents opponents control with mana value equal to zero.

This clever four-card lock completely strips your opponents of their lands and zero-mana permanents. Mycosynth Lattice transforms every permanent in play into an artifact, setting the stage for Karn, Silver Golem to animate those permanents by turning them into creatures with a mana value of zero. Thanks to Blossoming Tortoise making those land abilities cost {1} less to activate, Karn's ability becomes completely free to use. Finally, Ashaya, Soul of the Wild ensures that your opponents' creatures are also Forests, making their entire board vulnerable to being repeatedly animated into 0/0 creatures and immediately sent to the graveyard as a state-based action.