|Prime Material Plane|
Krynn is a Prime World preoccupied with its own problems and not very active in regards to the planes. In fact, the inhabitants of this world refer to practically any plane other than the Prime as the Abyss, so they give new meaning to the term "clueless." Aside from a few new spells and magical items, there's not much here of interest - although ruins under the Blood Sea of Istar are said to contain great treasure.
Note: Per Setting information, Krynn has not disappeared.
Setting Resource: Dragonlance Nexus