Zirda, the Dawnwaker + Izzet Guildmage + Manamorphose + Jace, Wielder of Mysteries

Spicy

How it works

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Cast Manamorphose by paying .
Holding priority, activate Izzet Guildmage by paying , copying Manamorphose.
Resolve the Manamorphose copy, adding and drawing a card.
If Jace is on the battlefield, repeat from step 2 until you draw from an empty library, winning the game.
Otherwise, repeat from step 2 until you have one card left in your library.
Resolve the original Manamorphose, adding and drawing a card.
Cast Jace from your hand by paying .
Activate Jace's first loyalty ability, causing you to draw from an empty library and win the game.

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

1–2 · Exhibition & Core

Spellbook classifies this as Spicy — not for these brackets.

3 · Upgraded

Allowed in this bracket.

4–5 · Optimized & cEDH

All combos are allowed.