Excellent hack of other OSR (and adjacent) games. Play procedures are mostly as Into the Odd, but character generation and spells resemble Knave. Inventory rules resemble Mausritter, including the idea that inflicted conditions take up inventory space.

Aside from some changes to the d100 spell list, the new material this brings includes a great summary of OSR principles of play for both players and GMs, pregenerated equipment packages that emulate the classic B/X classes and demihuman classes, and a handful of example monsters suited for Dolmenwood or other fairytale temperate forest settings.

Obviously it's free, but it's also *worth your time* to read.