mtg japanese booster box Magic: The Gathering - - The Brothers War - Collector Memory Adept 2019 Magic The Gathering MTG

And it has upside beyond that because you can put the counter elsewhere or cycle it early

Cloud of Darkness Rarity: Uncommon TYPE: Legendary Creature SUBTYPE: Avatar CMC: 5 Mana cost: USD: $0.13 EUR: 0.08 TIX: 0.03 EDHREC RANK: 16858 (3/3) Flying Particle Beam When Cloud of Darkness enters, target creature an opponent controls gets -X/-X until end of turn, where X is the number of permanent cards in your graveyard

These are modal instants that have a flexible mana cost

Once the number of lore counters on a Saga is greater than or equal to the greatest number among its chapter abilities, the Saga's controller sacrifices it as soon as its chapter ability has left the stack, most likely by resolving or being countered