The Raven Man [Dominaria United Prerelease Promos] Sliver Mutant Set: Throne of Eldraine Type:

Set: Throne of Eldraine Type: Enchantment Rarity: Rare Cost: {1}{W}{B} Whenever a Knight you control attacks

"If only there were a way to counter your inevitable whining

This plays very similarly to the flood mechanic in the Atlantis scenario from the Atlantis and Das Buch scenario packs

you may move any number of +1/+1 counters from Forgotten Ancient onto other creatures

The Raven Man [Dominaria United Prerelease Promos] Sliver Mutant Set: Throne of Eldraine Type:Set: Dominaria United Prerelease Promos Type: Legendary Creature Human Wizard Rarity: Rare Cost: {1}{B} At the beginning of each end step, if a player discarded a card this turn, create a 1 1 black Bird creature token with flying and "This creature can't block." {3}{B}, {T}: Each opponent discards a card. Activate only as a sorcery.