Sanar, Unfinished Genius // Wild Idea + Beacon of Tomorrows + Thassa, Deep-Dwelling

Decks

How it works

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If Beacon of Tomorrows is in your library, cast a copy of Wild Idea by paying , searching your library for Beacon of Tomorrows and putting it into your hand.
If Sanar doesn't have summoning sickness, activate it by tapping it, creating a Treasure token. Then, activate the Treasure by tapping and sacrificing it, adding .
Cast Beacon of Tomorrows by paying its mana cost, causing you to take an extra turn after this one and shuffle Beacon of Tomorrows into your library.
Blink Sanar using Thassa. It'll enter prepared due to its static effect.
Repeat each turn.

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

1–2 · Exhibition & Core

Spellbook classifies this as Ruthless — not for these brackets.

3 · Upgraded

Spellbook classifies this as Ruthless — not for these brackets.

4–5 · Optimized & cEDH

All combos are allowed.