UrGar is a magic Runeword created by combining a Ur Rune of Ritual and a Gar Rune of Invocation.
How to Create UrGar
You can create UrGar by adding the magic Ur Rune of Ritual and the magic Gar Rune of Invocation to a two-socketed Helm, Chest Armor, Pants, or Two-Handed Weapon.
Ur - Your Minion or Companion kills an enemy or dies. (10)
Gar - Gain 2.5% Critical Strike Chance for 5 seconds, up to 25%. (25)
Overflow
When UrGar overflows, you receive the Gar Rune's overflow effect (Gain Multiple Stacks) 0.2 times.
Overflow occurs when your Ritual generates more Offering than required for the Invocation. The overflow effect is proportional to the amount Offering overflows.