Evereth by sacrificing another nontoken green Insect.
When the Insect dies,
Zask and
Verdant Succession trigger.
Resolve the
Zask trigger, putting the Insect on the bottom of your library from your graveyard and causing you to mill two cards.
Resolve the
Verdant Succession trigger, searching your library for that Insect and putting it onto the battlefield.
Resolve the
Evereth ability.
Repeat.
Notes
Eventually the combo will stop in step 3, as the Insect will be milled into your graveyard. Note that you must control another nontoken green Insect besides
Zask.
If you have a way to kill
Evereth and ({1} magic symbol) ({BR} magic symbol) available, you can do so after putting a significant amount of +1/+1 counters on it to deal damage to each opponent using its second ability.
Results
Infinite self-mill.
Near-infinite +1/+1 counters on a creature.
Near-infinite creature ETB.
Near-infinite creature LTB.
Near-infinite creature sacrifice triggers.
Near-infinite death triggers.
Near-infinite damage.
Metadata
In 0 decks according to EDHREC.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).