Random Question - Creatures with powers that resist the prone effect?

[fba827]

Actually, yes it does.

DMG p. 55 "Solo monsters are specifically designed to appear as single opponents against a group of PCs of the same level." The rest of that section is also illuminating.

Of course it doesn't mean you can't include other monsters in the encounter, but a solo should be designed so that it can be used alone.

I get the point you're making that it could be used alone, as in, the only creature. But even if it is the only creature doesn't mean you shouldn't put in good environment/terrain/hazards/features/traps/etc. Otherwise, well, you get some static combats where people sit there hitting back and forth with big sticks in a race against HP depletion.