Make your own entrance.

You are about to walk through the front door, walking past the ghouls, when you remember something through your lust filled haze. Liches are cunning and smart as hell. This place is probably filled with magical tentacles filled with her cum, sex starved zombies, and a few ghouls she has enthralled, along with gods knows what else. Walking in through the front door, back door, side door or any door would be a gangbang with you at the center, taking a dick in all three of your holes.

You growl, and decide 'Fuck it, if none of the entrances are safe, I'll make my own damn way in'. And with that, you fly to the roof, and look for where a Lich would make a Library/lair. You see an intact glass dome, and several bookshelves within from the angle your at. A perfect area for a Lich to relax after a few hours of study, research, and fucking... and a perfect area for a horny Black Dragon to bust in at.

You take two steps back, and flap your massive wings, getting some air. Once your up a good few yards, you dive feet first at the glass dome, smashing your way through into the private study/library of the Lich.