Cheapest priced copy (Jumpstart): $5.99 at Card Kingdom, near mint, their price list as of .
Immolating Gyre 
Sorcery · Mythic · Jumpstart · #20
Immolating Gyre deals X damage to each creature and planeswalker you don't control, where X is the number of instant and sorcery cards in your graveyard.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $5.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Jumpstart | 20 | Mythic | $5.99 | — |
2 rulings from Wizards of the Coast
- 23 June 2020Because Immolating Gyre is still on the stack while it’s resolving, it doesn’t count towards the value of X.
- 23 June 2020In a Two-Headed Giant game, Immolating Gyre deals damage to your teammate’s creatures and planeswalkers.