: Undead possess a drastically different physiology than
: living beings. When the root boosts cellular
: regeneration, the body attempts to reorganize its
: physiology back to what it had when it was alive.
: However, it loses a viable undead physiological
: pattern before it can gain a viable living pattern,
: and so it simply falls apart. Kind of like trying to
: replace the engine in a car while you're driving it.
That doesn't explain why it would kill other animatrons, such as the Stygians. Perhaps the black magic that animates them is called unlife for a good reason and life-enhancing spell will derail it.
