Cheapest priced copy (Strixhaven: School of Mages): $0.59 at Card Kingdom, near mint, their price list as of .
Radiant Scrollwielder 
Creature — Dwarf Cleric · 2/4 · Rare · Strixhaven: School of Mages Promos · #221p
Instant and sorcery spells you control have lifelink.
At the beginning of your upkeep, exile an instant or sorcery card at random from your graveyard. You may cast it this turn. If a spell cast this way would be put into your graveyard, exile it instead.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.49 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Strixhaven: School of Mages Promos | 221p | Rare | $1.99 | $2.99 |
| Strixhaven: School of Mages Promos | 221s | Rare | — | $1.79 |
| Strixhaven: School of Mages | 221 | Rare | $0.59 | $0.49 |
| Strixhaven: School of Mages | 350 | Rare | $1.29 | $1.49 |
3 rulings from Wizards of the Coast
- 16 April 2021You still pay the mana cost when casting the exiled card, and you must follow all timing rules for it.
- 16 April 2021Some instant and sorcery spells instruct other things to deal damage rather than deal damage themselves. In these cases, you won’t gain life for that damage (unless the other things also have lifelink). Notably, a spell that instructs a creature you control to fight won’t cause you to gain life.
- 16 April 2021If an instant or sorcery spell you control with lifelink deals damage to you, you gain and lose that much life simultaneously. In this case, your life total doesn’t change. (You may gain life if the spell also deals damage to other permanents and/or players, however.)