Cheapest priced copy (Strixhaven: School of Mages): $0.49 at Card Kingdom, near mint, their price list as of .
Flamescroll Celebrant // Revel in Silence 
Creature — Human Shaman // Instant · 2/1 · Rare · Strixhaven: School of Mages · #150
Whenever an opponent activates an ability that isn't a mana ability, this creature deals 1 damage to that player.
{1}{R}: This creature gets +2/+0 until end of turn.
Your opponents can't cast spells or activate planeswalkers' loyalty abilities this turn.
Exile Revel in Silence.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $0.49 to $4.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Strixhaven: School of Mages Promos | 150s | Rare | — | $4.49Out of stock |
| Strixhaven: School of Mages | 150 | Rare | $0.49 | $0.49 |
| Strixhaven: School of Mages | 324 | Rare | $1.29 | $4.99 |
3 rulings from Wizards of the Coast
- 16 April 2021An activated ability that costs mana to activate is not a “mana ability” unless it could also produce mana and has no targets.
- 16 April 2021Activated abilities contain a colon and appear in the form “[Cost]: [Effect].” Some keywords (such as equip) are activated abilities and will have colons in their reminder texts. Loyalty abilities of planeswalkers are also activated abilities.
- 16 April 2021Casting Revel in Silence in response to a spell or ability won’t affect that spell or ability. That is, it’s not countermagic.