Rugged cacti cling to Athas’s rocky badlands and stony barrens. The thorns of most cacti are painful but not debilitating. The barbed cactus, on the other hand, has wicked hooks that cling to a creature’s flesh to cause lasting problems. This vegetation clumps in patches covering 3 or 4 squares.
Effect: A creature that enters a square of barbed cacti takes 3 damage per tier and a -2 penalty to attack rolls (save ends).
Usage: Barbed cacti cordon off certain areas of the battlefield, a fact that characters or monsters can use to their advantage. Cacti-covered squares can be accessed only by accepting damage and an attack hindrance.
Published in Dark Sun Creature Catalog, page(s) 134.