“ There are more ways than one to encounter a dragon. With a low level group it's obviously not feasible to meet one in its lair and fight it. But standing on a bleak moorland, utterly exposed and vulnerable, it can be a chilling experience to see something flying far far overhead. Something that could just be an eagle, but you never know...”
“ Rather than making a baddy impossible to hit, consider giving it mega-hit points.
Super hard to hit leads to great player frustration. Allowing them to do damage leads to a sense of accomplishment. another variation of this would be to give the bad guy a forcefield that shows damage.You could also give them a mastermind ability that sluffs the damage of to minions who should be easy to kill.Once in a while a super high to hit encounter is ok ,but it should be few and far between.
Your mileage may vary”