Moaner the Vampire
After completing 'Pyramid-life Crisis,' find Morbius imprisoned in Medieval England, near the jousting fields.
Gently knock away the guard, and dig the dirtpile where he was standing for the pieces to a lever. Pull the lever to disable one-quarter of Morbius' security.
There's also a clue by this lever. Follow the trail to another buried lever, and another clue, to a third lever.
For the fourth and final lever, fly up to the rune on the ledge above Morbius. The solution is the same as it was inside Strange's house, and completing it summons the last lever.
Pull the lever to free Morbius, and unlock him for purchase.
This also unlocks a Gwenpool Mission in the Hydra Empire.