As an Abomination, Derek had no muscles that could spasm, but he didn't know that. He fell on the ground only because the impact took him by surprise and he waited for the seizure for a few seconds before realizing nothing was going to happen.
"What the fuck? They have wands instead of guns here. This is definitely not the Earth of the past. If I have traveled through time instead of space, this is some weird future where magic replaced technology." Derek said while watching the darkness of his body eating at the remnants of the spell.
"Interesting. My current form seems to be immune to electricity. Let's see what else it can do."
The Void shot chore magic bullets of all elements against his hand, but they all phased through the Voidfeather armor.