Undeath

It is marvelous how effecient and practical the undead are. They need not eat nor sleep, and are able to work through the night, which makes them extremely valuable at a archeological dig site. I, for one, have never found better help and discipline as I have with the dead. - Head Archeologist Janus Bimblebo.

This spell creates an undead servant. Choose a corpse of a creature within range. Your spell imbues the target with a foul mimicry of life, raising it as an undead creature. To reanimate a creature you must use a spell slot level equal to the creatures CR. This means that the maximum CR creature one can reanimate is Challange rating 9. Creatures that have a lower CR than 1 still cost a 1st level spell slot.

The number of creatues one person can have at a time is equal to its Intelligence modifier.

Creatures reanimated with Undeath are under the users control until they die or are dispelled, which means it is not necessary to recast the spell to keep control. However, when the creatures dies, again, its body turns to ash and is not usable for Undeath.

A creature reanimated with Undeath only keeps its;
- Movement
- AC
- Health
- vulnerabilities
- One of its attacks if it has several
- its ability score, except its Intelligence and Wisdom which are reduced to 3 and 6 (stays the same if the original creature had less).

To give the creatur some of its original abilities, the caster can during the spell pump more spell slots into it. It costs two 1st lvl spell slots to gain one more ability, or one 2nd lvl spell slot and so on. If it is known what abilities the creature has, the caster can decide which ones the creature gets. However if the caster doesn't know if the creatures has a resistance and wants to find out, they use the spell slots, which are consumed wether or not the creature has the ability ot not.

It is not possible to give a creature legendary actions or resistances, even if the creature had it when it was alive.

Spells that require a spell slot and causes Necrotic dmg can be used on the reanimated creautres, healing them for half the amount of damage the spell would normally deal.

On each of your turns, you can use a bonus action to mentally command any creature you made with this spell if the creature is within your sight (if you control multiple creatures, you can command any or all of them at the same time, issuing the same command to each one). You decide what action the creature will take and where it will move during its next turn, or you can issue a general command, such as to guard a particular chamber or corridor. If you issue no commands, the creature only defends itself against hostile creatures. Once given an order, the creature continues to follow it until its task is complete.