Stave of Ruinous Corruption

Stave of Ruinous Corruption is a arcane item added in Total War: Warhammer in the Wood Elf patch. It is a legendary item for Morghur the Shadowgave.

It becomes available after winning the Morgur’s Ritual quest battle.

Description
Imbued with the quiddity of ruin, Morghur's gnarled staff summons deadly Chaos Spawn on the battlefield to do his bidding.

Effects

 * Active ability: Stave of Ruinous Corruption
 * Summons a unit of Spawn of Shadowgave.
 * This ability causes an enemy who is very low on health to immediately die and be replaced by a unit of Spawn. The ability occurs randomly, without player control.