Alice's sword strike just now was definitely the strongest she's made so far.
But the key issue was her attempt to slaughter three hundred thousand demonic soldiers in one go with the strength of a Nature Deity at her peak, which was utterly preposterous.
William watched as Alice, scared, hid inside the alchemy furnace with Jesus and the others, and he burst into laughter, It seemed as if he had just been discussing with Alice how important it is to be mentally strong.
Of course, he also knew that Alice would definitely charge in naively after hearing what he said!
Practicing swordsmanship, sometimes, requires one to be naive enough.
If one isn't naive, always worrying and fearing this and that, how can they become stronger?
William is definitely not the kind of weird grandpa who enjoys playing pranks.