Inverter of Truth + Thassa's Oracle + Ulamog, the Infinite Gyre

Powerful

Decks

How it works

You have a way to kill Ulamog if it is on the battlefield, or a way to discard it if it is in your hand.

Discard Ulamog if it is in your hand, or kill it if it is on the battlefield.
Ulamog triggers, shuffling your graveyard into your library.
Cast Inverter of Truth by paying .
When Inverter of Truth enters the battlefield, it triggers, exiling your library.
Cast Thassa's Oracle by paying .
When Thassa's Oracle enters the battlefield, it triggers, causing you to win the game.

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

1–2 · Exhibition & Core

Spellbook classifies this as Powerful — not for these brackets.

3 · Upgraded

Allowed in this bracket.

4–5 · Optimized & cEDH

All combos are allowed.