I have these in my basement, they ate some flies that were down there there and grew to gigantic proportions, like a big engorged chickpea. They were really active too, moving around to pounce.

uhhm I didnt name them. They were really cool though! Sometimes spiders just exist ✨

Based on the current feeling, I would then name this spider Sparkle, like one of the antagonists from Dai Dark.