Identify items

If you defeat a monster you can drop unidentified items of weapons and armor like the image below with low probability.
Minecraft identify item
You can have the appraisal item appraised by an expert witness (NPC).

Item rank

Dropped weapons and armor have equipment by occupation, the result of judgment will be low probability the higher the rank (1-5).

Rank
Rarity
1 common
2uncommon
3 rare
4
legend
5 Mystery
The higher the rare degree and the LV of the weapon armor, the higher the basic ability, the higher the probability that the additional ability will be randomly added. In addition, the probability that multiple abilities are added will also increase.
There is a level in the ability to be added, the higher the level of equipment, or the higher the rare degree, the higher the probability that high LV capacity will be added.