Dungeons & Dragons: Adventures in the Forgotten Realms

Blue Dragon | Creature | Dragon | Flying Lightning Breath — When Blue Dragon enters the battlefield, until your next turn, target creature an opponent controls gets -3/-0, up to one other target creature gets -2/-0, and up to one other target creature gets -1/-0. | Svetlin Velinov

Black Dragon | Creature | Dragon | Flying Acid Breath — When Black Dragon enters the battlefield, target creature an opponent controls gets -3/-3 until end of turn. | Mark Zug

Purple Worm | Creature | Worm | This spell costs {2} less to cast if a creature died this turn. Ward {2} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.) | Olivier Bernard