Campaign Concept: Queen Ascending

The adventurers have spent the first few levels hunting down the lair of a necromancer. Nothing unsurprising; the general dark cowl and bones aesthetic one would come to expect from a communer with the dead. The necromancer has seemingly been practicing new forms of raising undead and releasing their experiments upon the local countryside.

Summoner by Piotr Dura

Through valiant fighting and careful investigation, the adventurers have found the dark tower of their nemesis. They've scaled the staircase, avoided traps, discovered the true extent of the wizard's machinations. They burst through the final door, entering the necromancer's observatory, from which they can use the moon's power to fuel their rituals.

The fight begins. Spells are launched, blades collide, spectres shift through the floorboards to defend their master.

Then the tower walls explode. An airship has arrived. Three figures swing across on ropes, landing in the tower. One incapacitates the necromancer and shifts out of view, appearing on the ship once more. The other two draw their weapons, ready to engage the players.

Your necromancer has been stolen by githyanki raiders.