YaxQua is a rare Runeword created by combining a Yax Rune of Ritual and a Qua Rune of Invocation.
How to Create YaxQua
You can create YaxQua by adding the magic Yax Rune of Ritual and the rare Qua Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Yax - Drink a Healing Potion. (100)
Qua - Restore an Evade charge and gain 6% Movement Speed for 5 seconds, up to [6*5]%. (400)
Overflow
YaxQua can not overflow because the amount of Offering you receive from the Yax Rune exactly fills the required Offering of the Qua Rune.
Overflow occurs when your Ritual generates more Offering than required for the Invocation. The overflow effect is proportional to the amount Offering overflows.