Advanced Stitchwing [Game Night 2018] Angel Horror put a -1/-1 counter on

put a -1/-1 counter on each creature your opponents control

where X is the number of Slivers on the battlefield

and it isn't legendary if that permanent is legendary

Set: Arabian Nights Type: Creature — Human Noble Rarity: Rare Cost: {1}{W} {T}: Destroy target Djinn or Efreet

Set: Onslaught Type: Instant Rarity: Uncommon Cost: {U} Return target nonland permanent to its owner's hand

Advanced Stitchwing [Game Night 2018] Angel Horror put a -1/-1 counter onSet: Game Night 2018 Type: Creature Zombie Horror Rarity: Uncommon Cost: {3}{U}{U} Flying {2}{U}, Discard two cards: Return Advanced Stitchwing from your graveyard to the battlefield tapped. "Improvement is a consequence of practice." Stitcher Geralf