Ulasht in exile (exiled by Agatha's Soul Cauldron).
Utopia Mycon on the battlefield or in exile (exiled by Agatha's Soul Cauldron).
Agatha's Soul Cauldron and Wildwood Mentor on the battlefield.
Wildwood Mentor has at least one +1/+1 counter on it.
({1} magic symbol) available.
Steps
Activate Wildwood Mentor using Ulasht's ability by paying ({1} magic symbol) and removing a +1/+1 counter from it, creating a 1/1 Saproling creature token.
When the Saproling enters the battlefield, Wildwood Mentor's first ability triggers, putting a +1/+1 counter on itself.
Activate Utopia Mycon's second ability by sacrificing the Saproling, adding ({1} magic symbol) .