Alignment key

The alignment keys artifact skeleton keys found at the end of the alignment quests in SLASH'EM. They are all intelligent but otherwise have no special properties.

Opening the doors in Vlad's Tower
The main purpose of the alignment keys is to open the artifact doors in Vlad's Tower. In order to reach Vlad himself, two of the three keys (any two) are needed. However, as mentioned on alignment quest, this is not absolutely necessary to obtain the Candelabrum of Invocation.

Usefulness otherwise
In SLASH'EM, unlocking tools can break, whereas these artifact keys never will. Therefore, one's own alignment key is ultimately a very useful item to have, and even a cross-aligned key can be useful to open a chest without risking breaking the contents, although one will sustain up to 8d10 blasting damage for every use.