Guardian of the Forgotten triggers, manifesting the top card of your library.
When the manifested card enters the battlefield,
Gylwain triggers, creating a Role token attached to the manifested creature.
Resolve the
Evereth ability.
Repeat.
Notes
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 Spicy (Bracket 3-4+).