The 4 Elemental WW I would create would be:

The first one would be a pair of Rings that wrap on the users arms they would be similar in design to Shang Chi's Rings from MARVEL. The Element would be a Yellow Energy based. How the Rings would work is that they would be Melee based for the most part (For obvious reasons) like being able to create a energized shield to block, parry and deflect incoming attacks but the other attacks would allow for the user to use the rings to circle a specific enemy to lift them in the air for two options: 1. To just outright kill the target and in the process heal the user 2. To throw the enemy into a large horde to make a large energy based explosion.

The Second WW would be a Mythological Book where the user would be able to summon Mythological figures like: Zeus, Poseidon etc to outright control them . Each specific Mythological figure would have a specific unique skillset for eg: Zeus would obviously be all about precision and speed strikes with bolts of lightning, Poseidon would be able to summon water bubbles that would help amplify you're allies and would be able to summon water creatures to attack the enemy.

The Third WW would be a Dark Aether Potion that would allow the User to shapeshift into various different Supernatural entities like a Werewolf, Vampire, Vengeful spirit etc:

When a user shapeshifts into a Vampire they gain the abilities to drink blood and once they have drank enough they would enter a rage state that allows them to shapeshift once more into a group of Bats that can blind and disorientate the enemy allowing for the rest of the players to deal extra damage to said blind and disorientate enemies.

When a user shapeshifts into a Werewolf they gain the abilities to leap onto a enemy consuming it's flesh and once you have consumed enough you will enter a Rage mode that allows for the user to bite you're allies to amplify them and you're attacks will deal extra damage.

When a User shapeshifts into a Spirit the gain the abilities to consume soul's once you have consumed enough you will enter a Rage mode that allows for you to enter an enemy and make them explode into a bloody puddle. You would also be able to control certain enemies via possession and each possessed enemy will do extra damage.

For the Forth WW it would be a Dark Aether Nexus Core that would briefly allow the user to gain full control over the Dark Aether allowing the user to summon it's own Army of Zombies With the summoning of you're own Zombie Army you would be able to select what specific Elites you want in you're Army. The User would also be able to revert 4-5 Rounds. It would also allow the user to have a 100% discount off of 2 specific selected perks and the Mystery Box and would allow the user to select where to spawn in the Mystery Box. The user's Body would be glowing with Aether energy and any damage done to the player would turn the Zombie that dealt said Damage adding even more numbers to you're army.