Haakon, Stromgald Scourge + Morophon, the Boundless + Nameless Inversion + Magnus the Red
Haakon, Stromgald Scourge
Morophon, the Boundless
Nameless Inversion
Magnus the Red
Reduce the toughness of creatures opponents control to 0Reduce the toughness of each creature opponents control to 0 upon entering
How it works
Cast Nameless Inversion from your graveyard, as it is a Knight card, by paying 0 due to Magnus the Red and Morophon, giving a creature +3/-3 until end of turn.
If the creature has toughness 0 or less, the creature dies as a state-based action.