I don't think starting the fusion reaction is enough to create a star. You need enough mass for it to self-sustain. Either way, I'm not too bothered given that stuff like Bernhard's Planck pressure exists like you mentioned.
Re: mass number on big monster cards. I don't have them on hand but examples like Deryl's monster form being ~40 meters tall but only weighing ~5 tons. That's a ridiculously low number, off by several orders of magnitude. If we suppose he is the density of a human (~water) and shaped like cylinder 40 meters tall with a radius of 5m, then we'd expect him to weigh about 3000 tons.
Re: mass number on big monster cards. I don't have them on hand but examples like Deryl's monster form being ~40 meters tall but only weighing ~5 tons. That's a ridiculously low number, off by several orders of magnitude. If we suppose he is the density of a human (~water) and shaped like cylinder 40 meters tall with a radius of 5m, then we'd expect him to weigh about 3000 tons.