Broad
Broad is a damage type required to kill certain Slayer monsters in order to deal damage to them.
If you have this icon in your equipment screen 
then you are using Broad damage.
Weapons that deal Broad damage
- Leaf-bladed spear
- Leaf-bladed sword
- Broad arrows (from maple shortbow to demon longbow)
- Broad-tipped bolts (from adamant c'bow to demon c'bow)
- Magic dart (requires Slayer's staff to cast and autocast)