Re: spear pull on my trunking Yucca Rostrata
Yuccas are almost indestructible.
If the "spear" is rotting,
IT sounds horrible, but all you have to do is cut o cut off the rotting portion.
You may be left with a "T" shaped head, but it will fill in quickly with new leaves.
If you leave just the trunk, it'll grow multiple heads
I'd take the cut off portion & let it dry in the sun. Later put it in the ground & it'll root, giving you another Yucca rostrata.