Nexus Map (3.5e Equipment)
From D&D Wiki
|This material is published under the OGL|
Nexus Map: This flat piece of laquered wood is carved and inlaid to look like a map. If the item is used as a focus for teleport or a similar spell, it allows the caster to reroll the teleport % check. A reroll can only be made once per day. The caster must use the result of the reroll, even if it is worse than the original roll. Rumor has it that cursed versions of this item exist, causing true teleports to go awry and then randomly teleporting themselves into treasure hoards to be found by others.