Runeleech

Whether it be by a blessing from a trickster god, or a curse from the goddess of magic, you have lost any possibilities of arcane prowess, instead by a walking, talking magical syphon. You take magic items, strip them of their power, and use those as little upgrades instead.+1 piece of armor absorbed? Permanent +1 to AC. Sword that deals 100% more damage to dragons absorbed? You now deal 100% more damage to dragons. Whatever the magic item can do, you can do.

Absorption

Starting at 1st level, you can use your action to take a magic item you have, and absorb the powers of the item, reverting it to a normal item afterwards. You can use this ability a number of times equal to your proficiency bonus, and regain all uses when you finish a long rest.

Amplifying Blast

Starting at 6th level, as an Action, you can use all remaining uses of the Absorption ability to fire a beam of raw syphon energy. Every enemy affected takes 3d12 Force damage and must make a DC 16 Charisma save or be exposed to the effects, making them unable to cast spells for 3d4 rounds. You cannot use this ability until a week has passed.

Healthy Leech

Every 1 hour, you will regain 1d4 Hit Points. These Hit Points do not go over your maximum HP.

Syphoned Parasite

When you die, a Wild Magic Surge happens.