Essence of the Wild | Simulacrum Synthesizer | Encroaching Mycosynth

Cards

Cast
Encroaching Mycosynth by paying ({3} magic symbol) ({U} magic symbol) .
When
Encroaching Mycosynth enters the battlefield,
Simulacrum Synthesizer's second ability triggers, creating a 0/0 Contruct artifact creature token that enters the battlefield as a copy of
Essence of the Wild.
When the
Essence of the Wild token enters the battlefield as an artifact due to
Encroaching Mycosynth,
Simulacrum Synthesizer's second ability triggers, creating a 0/0 Contruct artifact creature token that enters the battlefield as a copy of
Essence of the Wild.
Repeat step 3.

This combo produces a mandatory infinite loop at step 3 which will cause the game to end in a draw if it is not interacted with. It is highly recommend to somehow interact with the combo once you have achieved your desired result.