CleaveCleave is a keyword that represents two static abilities that function while a spell with cleave is on the stack. “Cleave [cost]” means “You may cast this spell by paying [cost] rather than paying its mana cost” and “If this spell’s cleave cost was paid, change its text by removing all text found within square brackets in the spell’s rules text.” Casting a spell for its cleave cost follows the rules for paying alternative costs in rules 601.2b and 601.2f–h.
Cleave’s second ability is a text-changing effect. See rule 612, “Text-Changing Effects.” (CR 702.148) (You may
castTo cast a spell is to take it from the zone it’s in (usually the hand), put it on the stack, and pay its costs, so that it will eventually resolve and have its effect. A player may cast a spell if they have priority. See rule 601, “Casting Spells.”
To cast a card is to cast it as a spell. (CR 701.5) this spell for its
cleaveCleave is a keyword that represents two static abilities that function while a spell with cleave is on the stack. “Cleave [cost]” means “You may cast this spell by paying [cost] rather than paying its mana cost” and “If this spell’s cleave cost was paid, change its text by removing all text found within square brackets in the spell’s rules text.” Casting a spell for its cleave cost follows the rules for paying alternative costs in rules 601.2b and 601.2f–h.
Cleave’s second ability is a text-changing effect. See rule 612, “Text-Changing Effects.” (CR 702.148) cost. If you do, remove the words in square brackets.)
Target player reveals their hand. You choose a nonland card from it [with mana value 2 or less]. That player discards that card.