First Splintering of Thiliorúth

Lolth founded the first drow empire of Thiliorúth. When she became a Cult Power in 401 LE, her empire was left leaderless with no line of succession. A civil war followed over who would take the reigns. Some of those that lost were exiled, others disappeared. Some left on their own accord. In 411 LE, one of the latter groups, left their home world of Kriav for another. After passing through a feywild fuse, these Thiliorúth ex-pats, mostly Drow, resettled the Covenant ruin of Tyelmantar.