Bat

An enemy (combat level 22), found in Goblin Woodlands East, The Gutterworks, The Sewers. It has 1,100 health, 20 armor and 12 magic resist, and hits for 22.

Each kill gives 2,200 Mastery XP to the mastery of the weapon you are holding. Everyone who damages it gets the full XP and their own loot roll; party members standing nearby get the XP too. On a Slayer task it also pays Slayer XP — see below.