Does grimblight worth it ?

Tittle says all.

Well, all ACs items are just visual. Grimblight is an expensive ACs item, but it have some nice effects, and a small bonus on damage and rep.
So,Yes.

Fixed effects on June 17th, 2013
Does 6% extra damage against Chaos Monsters
Does 5% extra damage to all other monsters except Undead Monsters
Gives a 5% reputation boost
Grimblight of Destiny quotes/rune effects:
When clicked on by non-owners: "HAHAHAAAA… to command my powers you must own me…"
When clicked on by owner:
"I hunger… feed me Master. FEED ME!!!!"
"HAHAHAHHAHHAAAAAAAA!!!!!"
"HAHAHAAAA… do you want me to do something… EVIL.. master?"
"Heeehahahaha! What is thy bidding… master?"
Triggers a sound clip and has an animation of 3 runes appearing.
When top rune is clicked: "Master, this power can only be used inside a Grimskull Dungeon."
When center rune is clicked: All players say "…" and return to idle position if they were using emotes. The weapon says "BE STILL HUMANS!!! HAHAHA, MY MASTER COMANDS IT!"
When bottom rune is clicked: AFK players /feign. If there are no players AFK, then it says "Master, I am trying to slay players who have gone AFK… but I can't find any!"
Used to access Ultra Undead Raxgore on Screen 27 of Doom Vault B


well those are its benefits which is pretty good compared to other items that aren't rare and it also gives quotes like blinding axe of destiny so its just by if u need or want it