Graft stat buffs persist upon exiting realm

Death mage. Graft buff.
Enter realm and defeat enemies.
Exit realm through dying / forfeiting or through the shrine.

The stat buffs persist and apply when outside realms fighting sigil and god battles.

They persist when winning or losing at the arena.
Dying, forfeiting, or winning a castle sigil battle.

To reset enter a realm either shrine or artifact realm.

Win 10