Lomillialor is wood descended from the One Tree itself. It also called High Wood and it tended by Hirebrands of the Lillianrill Lore. In the ancient past, lomillialor was given to Lord Foul as a gift from Kevin Landwaster; it is said while he still possessed the rod, it never rejected him. A lomillialor rod is held by the Hirebrand Baradakas of Soaring Woodhelven in Lord Foul's Bane.
Lomillialor is described as a smooth wooden rod, three feet long, with all the bark stripped. It feels slick to the touch. Those who undergo the test of Lomillialor--a Test of Truth--have the rod tossed to them; if they catch it, then they are deemed right in the Land and if not they are deemed wrong. Thomas Covenant fails the test, while the Raver Jehannum fled from the sight of the rod.
Covenant later uses it to protect himself from Baradakas when he is attacked. Covenant wins and he is accepted by the woodhelvennin, although they note it is possible for Despite to wear the guise of truth. Baradakas later says in all the memory of the Lillianril, no Hirebrand has been struck by the High Wood as he had been.