Atlan Weapons
Generell infos:
For every melee type there is the possibilty to get a atlan weapon. The quality of the weapon you get depends on your total (buffed) weapon-skill so you may wait until it is high enough before going to get the Atlan weapon.
At total skill of 250 and above chances are good that you will get the best possible weapon (Peerless). The quality below that one is Superior.
The quality of your weapon also depends on the skills of the alchemist who combines the 2 pyreal bars of motes into an ingot. A quality ingot is the best possible one and again the skill needed is somewhere at 250 and above.(ask guildmates about names of honest alchemists, there is nothing worse than loosing 16 motes to a thief.)

The Facts:
1.) Collect 16 Pyreal Motes dropped by all kinds of golems (2-5% chance)
2.) Have a skilled Alchemist combining the motes into a ingot.
3.) Travel to the Crater and inside is a tower with the alchemist Silencia(NPC) and her pet magma-golem. The travel thru the crater-gateway is dangerous, many zefirs and ghost wisps so either use a group or find a mage to portal you there.
4.) Buy the appropriate weapon-glyph from Silencia (costs 9000pyreals, but she accepts notes).
5.) Buff your weapon skill as much as possible and stamp the ingot with the glyph.
6.) Hand the stamped ingot over to the Magma Golem and he will create the Atlan Weapon for you.