Heart of the Oak
4 sockets · Staff / Mace · Level 55 · Patch 1.10
All runes · Rune #18 of 33 · Required level 39
The Ko rune can be socketed for the bonuses below or saved for a runeword. Its effect depends on the equipment slot; a rune by itself does not create a runeword.
3 Lum Runes + 1 Flawed Amethyst → 1 Ko Rune
3 Ko Runes + 1 Flawed Sapphire → 1 Fal Rune
Place the listed ingredients in the Horadric Cube and transmute. Upgrading consumes those ingredients; check your planned runewords before spending runes. View all rune upgrade formulas.
Reference farming areas from the app:
Rune drops depend on difficulty, monster or chest type, and game settings. These are farming suggestions, not guaranteed drops or a fixed drop rate. The Countess's special rune table reaches Ral in Normal, Io in Nightmare and Ist in Hell; her ordinary item drops are a separate table.
12 runewords in this database use Ko. Follow each link for the full stats, compatible base types, sockets and patch requirements.
Previous rune: Lum · Full rune list · Next rune: Fal