A video showing the Sulfur Ball weapon type and some of its abilities.
Originally items in the first Skylight, Sulfur Balls returns as weapons in Skylight Freerange 2: Gachduine. They deal solid acid damage to an area and ignore defense, though they have low ammo.
Unlike other wide area weapons, like Rocket Launchers, Barrels and C4, Sulfur Balls do not hurt your user or their allies. If the user already has the Ignore Defense Competency, damage is further tripled with Sulfur Ball attacks.
Competencies shown in the video include:
Quick Throw - Lowers Speed Counter recovery from Sulfur Ball attacks. Also applies to the Napalm Ball and Sonic Ball Competencies. Pitcher - Increases the range of Sulfur Ball attacks. Also applies to the Napalm Ball and Sonic Ball Competencies. Melt Armour - When hit by a Sulfur Ball, enemies suffer double damage until they take 3 more turns. Melt Weapon - When hit by a Sulfur Ball, enemies deals only 0.25x damage until they take 3 more turns.