Transformed to Spawn

Pick a friendly Disciples of Tzeentch Wizard to cast this spell, pick a visible enemy unit within 12" of them to be the target, then make a casting roll of 2D6.

Inflict D3 mortal damage on the target. If any models are slain by this ability, pick a friendly Chaos Spawn of Tzeentch unit that is in reserve as a potential fate or that has been destroyed. If you picked a unit in reserve as a potential fate, set it up on the battlefield in combat with the target. If you picked a unit that has been destroyed, set up an identical replacement unit on the battlefield in combat with the target.