Cheapest priced copy (The List): $4.49 at Card Kingdom, near mint, their price list as of .
Sedgemoor Witch 
Creature — Human Warlock · 3/2 · Rare · Strixhaven: School of Mages · #306
Menace
Ward—Pay 3 life. (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays 3 life.)
Magecraft — Whenever you cast or copy an instant or sorcery spell, create a 1/1 black and green Pest creature token with "When this token dies, you gain 1 life."
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $4.49 to $19.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The List | STX-86 | Rare | $4.49 | — |
| Strixhaven: School of Mages Promos | 86p | Rare | $4.49 | $9.99 |
| Strixhaven: School of Mages Promos | 86s | Rare | — | $15.99 |
| Strixhaven: School of Mages | 86 | Rare | $4.99 | $8.99 |
| Strixhaven: School of Mages | 306 | Rare | $8.49 | $19.99 |
6 rulings from Wizards of the Coast
- 16 April 2021Each magecraft ability has a different effect, although they all have the same trigger condition, whenever you cast or copy an instant or sorcery spell.
- 16 April 2021If an effect creates a copy of an instant or sorcery spell, this will also cause the magecraft ability to trigger.
- 16 April 2021If an effect creates multiple copies of an instant or sorcery spell, magecraft abilities trigger once for each copy created by the effect.
- 16 April 2021If a player casts a spell that targets multiple permanents their opponent controls with ward, each of those ward abilities will trigger. If that player doesn't pay for all of them, the spell will be countered.
- 16 April 2021Some effects instruct you to copy an instant or sorcery card in a zone other than the stack. These copies do not cause magecraft abilities to trigger. However, most effects that do this also allow you to cast the copy, and casting the copy will cause magecraft abilities to trigger.
- 16 April 2021For example, if you control Archmage Emeritus and cast an instant or sorcery spell, Archmage Emeritus's magecraft ability will trigger and you will draw a card.