XolYom is a legendary Runeword created by combining a Xol Rune of Ritual and a Yom Rune of Invocation.
How to Create XolYom
You can create XolYom by adding the legendary Xol Rune of Ritual and the legendary Yom Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Xol - Invoke a Skill from another Class. (150)
Yom - Invoke the Druid's , Stunning enemies and restoring Primary Resource. (500)
Petrify
Overflow
XolYom can not overflow because the Yom Rune does not have an overflow effect.
Overflow occurs when your Ritual generates more Offering than required for the Invocation. The overflow effect is proportional to the amount Offering overflows.