Flamescroll Celebrant
Creature — Human Shaman
Whenever an opponent activates an ability that isn't a mana ability, this creature deals 1 damage to that player.
: This creature gets +2/+0 until end of turn.
Revel in Silence
Instant
Your opponents can't cast spells or activate planeswalkers' loyalty abilities this turn.
Exile Revel in Silence.
Uriah Voth
Rulings
An activated ability that costs mana to activate is not a “mana ability” unless it could also produce mana and has no targets.
(wotc • 2021-04-16)
Activated 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.
(wotc • 2021-04-16)
Casting Revel in Silence in response to a spell or ability won’t affect that spell or ability. That is, it’s not countermagic.
(wotc • 2021-04-16)
Rulings
An activated ability that costs mana to activate is not a “mana ability” unless it could also produce mana and has no targets.
(wotc • 2021-04-16)
Activated 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.
(wotc • 2021-04-16)
Casting Revel in Silence in response to a spell or ability won’t affect that spell or ability. That is, it’s not countermagic.
(wotc • 2021-04-16)