Got Teleported into undercroft via the countdown timer in the lone story and fused with my horse.
If nekros was a horse:
I could cast abilities and would temporarily transform partially back during the animation. But ran out of energy and could not pick up anything from ground.
I could fire my weapons after loading in. But running out of ammo in the magazine caused my game to switch to the next weapon and I couldn't reload. (Ran out of ammo and couldn't shoot anymore).
Transference in Duviri turned me into my operator (T-posed, of course).