March of Swirling Mist [Kamigawa: Neon Dynasty Prerelease Promos] BW18 if an opponent discarded a

if an opponent discarded a card this turn

If a source you control with an odd mana value would deal damage to a permanent or player

For each 1 damage that would be dealt to Rock Hydra

Sacrifice this artifact: Add {R} or {G}

Set: Innistrad: Crimson Vow Tokens Type: Token Creature — Slug Rarity: Common Defender

March of Swirling Mist [Kamigawa: Neon Dynasty Prerelease Promos] BW18 if an opponent discarded aSet: Kamigawa: Neon Dynasty Prerelease Promos Type: Instant Rarity: Rare Cost: {X}{U} As an additional cost to cast this spell, you may exile any number of blue cards from your hand. This spell costs {2} less to cast for each card exiled this way. Up to X target creatures phase out. (While they're phased out, they're treated as though they don't exist. Each one phases in before its controller untaps during their next untap step.)