What Must Be Done
What Must Be Done: Sorcery, Assassin's Creed. Choose one - • Let the World Burn - Destroy all artifacts and creatures. Prices and printings on Mana Grove.
- Mana cost
- {3}{W}{W}
- Mana value
- 5
- Type
- Sorcery
- Colour identity
- White (W)
- Rarity
- Rare
- Set
- Assassin's Creed (ACR)
- Released
- 2024-07-05
- Collector number
- 11
- Artist
- Syd Mills
- Commander rank
- 8,249 (by how often it appears in Commander decks)
- Keywords
- Release Juno, Let the World Burn
Build around this card with Grover
About What Must Be Done
What Must Be Done is a Magic: The Gathering card, a rare white sorcery from Assassin's Creed (ACR), a draft-focused set released in July 2024. It is collector number 11 in that set, with art by Syd Mills. It costs {3}{W}{W} (three generic and two white mana) to cast, for a mana value of 5. Its colour identity is white. It is legal in Modern, Legacy, Vintage, Commander, Duel Commander, Oathbreaker and Penny Dreadful. Assassin's Creed is its only printing so far. The latest aggregated market price for this printing is $0.35 (normal finish, as of 2026-11-01).
Card text
Choose one -
• Let the World Burn - Destroy all artifacts and creatures.
• Release Juno - Return target historic permanent card from your graveyard to the battlefield. It enters with two additional +1/+1 counters on it if it's a creature. (Artifacts, legendaries, and Sagas are historic.)
Market price
Latest aggregated market price for the normal finish of this printing: $0.35 (as of 2026-11-01).
The figure covers this printing only; other printings carry their own price on their own page.
Format legality
Legality of What Must Be Done by format. Formats in which it is not legal are not listed.
| Modern | Legal |
|---|---|
| Legacy | Legal |
| Vintage | Legal |
| Commander | Legal |
| Duel Commander | Legal |
| Oathbreaker | Legal |
| Penny Dreadful | Legal |
Other printings of What Must Be Done
The other printings are listed newest first, with the rarity and release year of each.
| Printing | Rarity | Year |
|---|---|---|
| Assassin's Creed (ACR) #157 | Rare | 2024 |
| Assassin's Creed (ACR) #184 | Rare | 2024 |
Official rulings
Four official rulings apply to What Must Be Done, newest first.
- Some abilities trigger “whenever you cast a historic spell.” Such an ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered.
- Lands are never cast, so abilities that trigger “whenever you cast a historic spell” won’t trigger if you play a legendary land. They also won’t trigger if a card on the battlefield transforms into a card with the legendary supertype, the artifact card type, or the Saga subtype.
- An ability that triggers “whenever you cast a historic spell” doesn’t trigger if a historic card is put onto the battlefield without being cast.
- A card, spell, or permanent is historic if it has the legendary supertype, the artifact card type, or the Saga subtype. Having two of those qualities doesn’t make an object more historic than another or provide an additional bonus-an object either is historic or it isn’t.
Similar cards
Other sorcery cards with a white colour identity, ranked by how often they appear in Commander decks.
Mentioned in these guides
These guides mention What Must Be Done.