Cheapest priced copy (Strixhaven: School of Mages Promos): $0.49 at Card Kingdom, near mint, their price list as of .
Draconic Intervention 
Sorcery · Rare · Strixhaven: School of Mages Promos · #96p
As an additional cost to cast this spell, exile an instant or sorcery card from your graveyard.
Draconic Intervention deals X damage to each non-Dragon creature, where X is the exiled card's mana value. If a creature dealt damage this way would die this turn, exile it instead.
Exile Draconic Intervention.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.49 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Strixhaven: School of Mages Promos | 96p | Rare | $0.49 | $0.49 |
| Strixhaven: School of Mages Promos | 96s | Rare | — | $0.69 |
| Strixhaven: School of Mages | 96 | Rare | $0.49 | $0.49 |
| Strixhaven: School of Mages | 309 | Rare | $0.49 | $0.99 |