You were designed to be a strategist adapteble for any form of combat. You have a +2 Intelligence and +1 in two other stats of your choice.

You are a distorted and horrific combination of two separate skeletons from two different races fused together by magic. You may have anywhere between one eye socket or four, your hands and feet may have a few extra digits or a few less that are larger than what seems practical. Your body is quite open and hollow giving you resistance to piercing damage. You may have some over calcified vertebrae with a few spines on them or extra bones merged on top of one another. You are also immune to poison on account of being a skeleton.

Your hight is given by the tallest of the two skeletons that comprise your form and your weight should not exceed 100 lb. You are a small or medium sized creature based on overall hight.

You also don't need to eat, drink, sleep or breath. 

Your base walking speed is 30 ft.

Amalgamation Skeletons aren't typically made with free will in mind. Those that become sentient individuals tipaclly stay with the lich who made them. The few who decide to seek more than servitude to there master lich find themselves hunted by there maker or any number of palidans and monster hunters seeking to rid the world of evil. Your alignment leans towards Chaotic Neutral.

Your unnatural features and disterbing visage granted by the necromancy that made you gives you Proficiency in the Intimidation skill.

 You can't be magically put to sleep.

At level 1 you learn one cantrip of your choice from the Wizard, Bard, Druid, Sorcerer or Warlock spell list. The spell casting modifier depends on the spell list chosen.

When an undead creature that is within 100 ft of you that can see and hear you with a CR equal to your player level, divided by 4 or lower makes an attack roll against you or uses an ability that would harm you. (Such as using an AOE attack.) The creature must make a wisdom saving throw equal to, 8 plus your proficiency bonus plus your Intelligence modifier. On a failed save the creature won't willingly attack you and only you for the next 24 hours unless it is defending it's self from you or is under the control of something/someone else. On a successful save the undead creature is immune to the affects of this ability for the next 24 hours.

When your HP is reduced to 0 you are completely aware of your surroundings but are unable to move or interact with them. When you succeed on a death saving throw you regain 1HP and are considered prone.

 If you kill any creature your size or larger, you gain a number of temporary hit points equal to your constitution modifier. (Minimum of 1) Your temporary hit points last until you lose them in combat or take a long rest.

You can speak, read and write Common, Infernal and one language that was known by the skeletons that your body is made of.