Stalizalfos

Stalizalfos are a type of Stalfos in the Zelda series. Like the other types of Stalfos, they are skeletons brought back to life thanks to Ganon's magic. In the case of the Stalizalfos, it is the skeleton of a Lizalfos that was brought back to life.

The Legend of Zelda: Breath of the Wild
In The Legend of Zelda: Breath of the Wild, they can equip themselves with any type of weapon they found like a regular Lizalfos. They can also uses their tails as a weapon if they have noo regular weapons equipped. Like other common types of Stalfos in the game, they will fall apart if Link attacks them. They can rebuild themselves quickly after falling apart but it is a good way to attack their heads, which is their only weak point. If they are in a group of enemy comprised of other Stalizalfos, the body will continue to reform and weild weapons until all heads have been dealt with. If Link wears the Lizalfos Mask, Majora's Mask, or the full Radiant Set or Phantom Ganon Set, Stalizalfos will not attack Link unless he attacks them.

Hyrule Compendium Entry
"The remains of Lizalfos appear in the dark of the night. They're as sly as ever, even now that they're just some bones stacked atop each other. However, their bodies are much more fragile, and a single solid hit can reduce them to pieces. If a skull remains intact, they will pull themselves back up and continue to fight. They've been known to grab the wrong skull at times, but they never seem to mind..."