Scourge of the Corruptor

73 melee damage 17% critical strike very fast speed average knockback 'A powerful javalin that unleashes tiny eaters'

Found in the hardmode dungeon's corruption chest. A spear shape projectile comes out, when it collides with a wall or enemy, it will do damage and spawn 3 tiny eaters. Tiny eaters will burst out in different directions from the spot hit, then appear to have heat seeking like movement towards enemies (if any is around).

A friend of mine got this from a downloaded item server. However, when the tiny eaters burst out they glowed blue. when i got it Legit they did not do this. Can someone confirm how/why it does this?