2008 · Kaynak kitap (oyunu geliştirmek için kurallar/seçenekler)

Book of Experimental Might

A collection of experimental rules for d20 System campaigns, focused on keeping characters active for longer between rests. It introduces a spell progression system covering levels 1 to 20, revised healing and curative magic, and magical disciplines that give spellcasters reliable powers and ways to contribute. The supplement adds the runeblade base class, which combines martial skill with magic without using spells, along with revised options for wizards, clerics, druids, paladins, and rangers. It also includes new spells, feats, magic items, and other rules intended to reduce the need to stop adventuring when spell or hit-point resources run low.