Destroy all creatures with mana value X or less.
The Caterans call it a screening process. The dead are in no condition to argue.
Illustrated by Greg Hildebrandt & Tim Hildebrandt · Mercadian Masques · #136
There are no rulings for Forced March.
Destroy all creatures with mana value 3 or less.
Cleave (You may cast this spell for its cleave cost. If you do, remove the words in square brackets.)
Destroy all creatures [with mana value 2 or less].
Destroy target creature with mana value 2 or less.
Cycling (, Discard this card: Draw a card.)
Each creature with mana value X or less loses all abilities until end of turn. Destroy those creatures.
Destroy target creature or planeswalker with mana value 3 or less.
Destroy target creature with mana value 3 or less. If it's your turn, create a Food token. (It's an artifact with ", , Sacrifice this token: You gain 3 life.")