Wall of Caltrops

Creature - Wall 2/1, 1W (2)
Defender (This creature can't attack.)

Whenever Wall of Caltrops blocks a creature, if no non-Wall creatures are blocking that creature, Wall of Caltrops gains banding until end of turn. (If any creatures with banding you control are blocking a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by.)¹
"Ow! Ow ow ow! Ooch, ow, OW!"
Illus. Brian Snõddy

Gatherer Card Rulings [Nov 2009]

• 10/4/2004: Banding is gained when the trigger resolves in the declare blockers step of the combat phase if the criterion is met.

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard, MTGO Classic
Printings (1/2)	Legends (Common (R1))