Widowlings are small spiders found in the Dungeons of Fate.
Widowlings are infantile Creeping Widows and Widow Queens, so their attacks don't cause as much damage, but can still poison the player. Widowlings are generally easy to kill, but are always accompanied by a Widow Queen along with up to 4 fellow Widowlings. There is an easter egg in the game that allows for Widowlings to spawn naturally without being spawned by the Widow Queen on levels 10,000 and deeper.
Taking on more than one pact of widowlings at a time is not advised.