A Pattern Blade is traditionally a weapon where the Pattern has been infused into the blade, although Duncan has a different smithing technique where the Patternness is the primary weapon. Generally, these weapons are edged, but Fiona managed to make a pattern hammer that is still sharp.

Known Pattern weapons are:

1. The Sword of State - Was in the control of Neville usually in the posession of The Grey Man, and therefore possibly subject to the summoning of the Steward of Amber.
2. Eric’s PatternBlade - Tied to the Pattern in Castle Amber. As far as is known, it’s name might be “My Blade”, since Eric was never that creative. Was in Neville’s posession and is now supposedly in House Helgram somewhere.
3. Uber-Merlin’s Pattern artifact stash - suspected to have been shifted inside Oberon, and thus looted by Neville. Might also be in House Helgram somewhere.
4. Werewindle - Tied to the Pattern in Castle Amber. On Martin, under a “Somebody Elses Problem” field of some kind.
5. Greyswandir - Tied to Tir’s Pattern. There should be three copies of Greyswandir floating around. Two are local and were duplicated when Norton was duplicated on The Spiral, one is from an alternate Amber.
   1. Sandy Corwin has a Greyswandir.
   2. Norton has a Greyswandir, usually shapeshifted inside him.
   3. One of the Greyswandirs are missing, probably lost by the Clown Prince but might be in Malachai’s possesion.
6. Andauntrick - Tied to the Primal Pattern. Most recently wielded by Merlin.
7. Mjolnir, pattern hammers created by Fiona as a psyche-to-warfare transmuter. Apparently various Fionas have thought this to be a good idea, across Slices of Fruit.
   1. Local Mjolnir - budded into by Jean, infused with Variable Pattern by Gentleman Suhuy, then destroyed by Oberon when it was used against him.
   2. Uber-Mjolnir - budded into by Jean as a replacement for Local Mjolnir. Currently the gavel of the Primal Jean that is currently the Steward of Amber.
   3. Variable-Pattern Mjolnir - Destroyed by Oberon. For some reason it had gopher teeth-marks on the handle. It is unclear why.

Duncan created a large number of Pattern weapons and artifacts.

I believe the Pattern Blade brought to a duel by someone defeated by Janus is still floating around, but I forget where.

See also the entry on Logrus Blades and Morganti Weapons.