You need to reserve at least 1 Ogre Missive for the Warmaul of the Warmaul Chieftain, as the artifact requires 200 fragments, which is exactly at the limit of what your characters can carry.
As noted, in 6.1, your fragment limit has been increased to 250.
exactaly 200? Where the @#$% do you find just 1?
Sold 9 for 1200g each on Draenor-EU.
Tip: To keep too many of these completion items from collecting in your bags, use them with every solve, and not just the last one.
"Schlüsselstein, der archäologische Artefakte der Oger mit fehlenden Fragmenten vervollständigen kann."