Activate Ashnod's Altar by sacrificing any other non-Spirit creature, adding {C}{C}.
When the creature dies, Requiem Angel triggers, creating a 1/1 Spirit creature token that enters the battlefield as a copy of Essence of the Wild.
Repeat.

Infinite LTB

Infinite colorless mana

Infinite death triggers

Infinite ETB

Infinite sacrifice triggers

Essence of the Wild

Requiem Angel

Ashnod's Altar

Cast Mycosynth Lattice by paying {6}.
When Mycosynth Lattice 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 Mycosynth Lattice, 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.

Infinite creature tokens

Draw the game

Simulacrum Synthesizer

Mycosynth Lattice

Combos with "Essence of the Wild"