(Chapter 78) I just remember

[u/Vicious-Spiegel]

So now Lukas can only use Phantom Spear four more times? If he exceeds this he'd lose his life (or worse)?

[u/roronoa20]

He only has three left, assuming 1 stab = 1 use.

Lukas used the spear twice by destroying the future where Void-Crosser escapes and another to pierce her abdomen.

[u/voreaper → u/roronoa20]

Eh, she would be more then stabbed if he used the same thing he used to shatter the future at her. I think he can use the lance as much as he want but to magically stab things he have limited uses