From: Some_Character | #036
Hmhm. Alex, given a little bit of time probably could destroy a mountain with the high velocity at which some of his attacks are executed. Given that he doesn't die first, of course. Which brings me to another question: what would Lord Foul do first in this battle?
Good question. Depending on whether he's able to sense anything about Mercer (which I honestly couldn't tell you if he could or not), he'd probably start off with an illusion of whatever he thinks Mercer wouldn't be able to figure out a way to break or by just talking to him to try to find out how best to actually fight. When it comes down to direct combat, he'd likely first go for just throwing out waves of energy to try to pin Mercer to the ground before blasting him (Foul went for something like that against Covenant IIRC and his servants have tried similar things a lot), which might not even be too necessary if the power gap is enough because if you're not that strong, just letting loose some of his power would be enough to leave Mercer immobilized (Alex can probably overcome that if Foul's not directly focusing on it though).
We've only ever seen him fight when he had good reason to stay in place so how he'd handle a mobile battle is hard to say, but he's had his armies use pretty good tactics (lots of indirect tricks and constantly changing tactics to wear down opponents) so he'd probably do similar things, which is manipulating the weather a bit to reduce visibility and firing energy blasts from a distance, and if he had enough space, trying to summon shades of the dead from the ground or summoning monsters. If he figured out that Alex is a virus that can be destabilized (like the way Cross did to him with the parasite that eventually became the Supreme Hunter) he'd probably try something like the venom he had his servants use on Covenant in the second trilogy (which amped Covenant's power up, but made it extremely volatile so he couldn't control himself without extreme effort that left him exhausted every time he did it).
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Mistake you're making - overlooking the fact that we might not want to be saved.