The Kingmaker adventure to start us off but please feel free to go off the rails.  Start at level 3 max hp for level and with magic artifacts to make combat more interesting.   some of these artifacts for example are :  1 Spine of Black Bones- This bone when inserted into a creatures back  grow a Third skeletal arm from the spine that will allow for 2 reactions a turn. This one can eventually turn a player into a lich of they choose. 2 Heart of Conrassu- Replaces a living creatures heart that sleeps with this in their hand. The player with this heart adds 3 to their con stat and can choose from to either leave pools of spiked blood when damaged  on the floor that damages enemies who end their turn or enter the area for 2d4 or gain 2d6 hp at the start of their turn. The choice is made at the start of the day.  3 Garricks Necklace- This Necklace allows the wear the ability to concentrate on two spells at the same time twice a day. if you have an idea for something let me know im fine with creating new ones.