Yawgmoth, Thran Physician + Enduring Renewal + Edgewalker + Cathedral Sanctifier

Exhibition

How it works

Activate Yawgmoth by paying 1 life and sacrificing Cathedral Sanctifier.
When Cathedral Sanctifier dies, Enduring Renewal triggers, returning Cathedral Sanctifier from your graveyard to your hand.
Resolve Yawgmoth's ability from step 1, causing you to draw a card.
Cast Cathedral Sanctifier by paying .
When Cathedral Sanctifier enters the battlefield, it triggers, causing you to gain 3 life.
Repeat until you've drawn a sufficient number of cards.
Activate Yawgmoth by paying 1 life and sacrificing Cathedral Sanctifier, targeting Cathedral Sanctifier.
When Cathedral Sanctifier dies, Enduring Renewal triggers, returning Cathedral Sanctifier from your graveyard to your hand.
Yawgmoth's ability from step 6 fizzles due to having no legal targets.
Cast Cathedral Sanctifier by paying .
When Cathedral Sanctifier enters the battlefield, it triggers, causing you to gain 3 life.
Repeat from step 6.

In which brackets is this combo allowed, per Spellbook's Exhibition tier?

1–2 · Exhibition & Core

Allowed in this bracket.

3 · Upgraded

Allowed in this bracket.

4–5 · Optimized & cEDH

All combos are allowed.