Another name possibility for that ability is "Temporal Distortion."
Here's another idea.
"Infinite Chrono-meddler" (or another name that suggests this unit meddles with the timeline)
Model: Dragonspawn caster
Weapons: Slow attack, medium or high damage.
Movement: Medium speed ground unit.
Life/Armor: Medium or high life/armour.
Abilities: Chronology Displacement: Draws a 'future version' of the targeted unit into the present period of time. This would essentially be mirror image, but the produced unit would be able to inflict damage.