Summon Mursaat question

I am not clear on how you get this skill.
Do you buy a gold polymock piece or is it some sort of reward when you beat some guy in polymock?

Any answers would be appreciated.

its a quest reward for defeating master hoff in the polymock quest chain. Its the last quest in the chain.

You need to travel to Rata Sum, there you can speak with Hoff who will give you 3 polymock pieces which you need to take to Denn in order to register them. After you have registered them continue on in that quest and defeat each Polymock NPC. With each defeat you will get another quest and so on until you fight the last NPC the Polymock Master, once you have beaten him you will get Summon Mursaat.

I looks like you get it as a reward for the quest "Defeat Master Hoff", there is the wiki page that talks about it.

Wiki

Krat

First you need to have the Mursaat Elementalist gold piece (which is drop from dungeon endchest, duncan the black i think), then go to Rata Sum to register the piece, go on with the quest, beat the last NPC to acquire the skill.

all you need to do is the quests...

what the heck are you talking about .. you don't need the mursaat polymock piece. you just need to finish the quest line.