A treacherous door to enter. Take a deep breath, focus your mind, and leap into the ice.
"The wind-driven snow parts for the barest of seconds, revealing a glimpse of refuge from the deadly storm. It’s a massive sapphire pyramid. Yet you know of nothing like it in this area…"
In the trackless Frozen Waste, at the heart of the Sra lands lies the sacred glacier Ganamed, wherein lies Illyana’s Palace, the great ice necropolis of the Sra tribe.
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