Ultimate Resurrection

A wave of green light will spread from the point of casting (your position) and raise as many creatures within range from the dead. 

You will be able to summon the following amount of creatures depending on the size:

Tiny--15 creatures

Small--10 creatures

Medium--8 creatures

Large--5 creatures

Huge--3 Creatures

The spell cannot reanimate Gargantuan creatures.

You are able to either control all of them simultaneously or one of them individually and give them commands:

Simultaneous Command Examples (You can select certain groups for certain tasks)

"Guard this area" 

"Attack that monster"

"Defend that ally"

Individual Command Examples

"Steal that object" 

"Guard that person"

"Fight alongside him/her"

If no commands are given to any undead, they will defend themselves from threats.

Upgrades

If you wish, you are able to give your undead some abilities. However, they must only have spells with the maximum level of 3

Example: Magic Missile, Sheild, Misty Step, Animate Dead, and Counterspell

While doing the spell, you are completely stationary on your knees in meditation, your eyes glowing a bright, emerald green. In this state, you are vulnerable to enemies, so make sure you have an ally or Undead guarding you.

If the concentration is broken, all Undead will collapse on the ground lifeless.

Authors Note

This is my first spell, so it might be bad to some people, and it might be good to other people. Overall, I hope you enjoy this spell if you choose to bring it into your campaign. If there are any issues with this spell, please feel free to let me know in the comments.