LCCG's Elemental Lord

Awakened Storm Guardian, Maelstrom
Level 8 Aqua/Effect Wind 2800/2600
Cannot be normal summoned or set. Can only be Special summoned by shuffling 2 WIND monsters you control to the deck when you have 5 or more WIND monsters in your graveyard. When this card is special summoned, return 3 cards your opponent controls to the bottom of their deck. When this card leaves the field, both players reveal their hand then each player choose one card from their opponent's hand and shuffle it to the deck. Skip your next battle phase.
“Perish inside the storm, Terminal Maelstrom!”

Unrestrained Purging Wing, Feng Huang
Level 8 Thunder/Effect Fire 2500/2900
Cannot be normal summoned or set. Can only be special summoned from your hand or graveyard by destroying 2 face-up FIRE monsters you control when you have 5 or more FIRE monsters in your graveyard. When this card is Special Summoned, destroy all other face-up cards on the field. When this card leaves the field, select 1 card you control and another card your opponent controls. Destroy them, and then you cannot summon another monster until your next end phase.
“Arise from the ashes of defeat, Infernal Tempest!”

Eternal Primordial Serpent, Ouroboros
Level 8 Sea-serpent/Effect Water 2700/2700
Cannot be normal summoned or set. Can only be special summoned from your hand or graveyard by discarding 2 WATER monsters when you have 5 or more WATER monsters in your graveyard. When this card is special summoned, randomly discard 2 cards from your opponent’s hand, then send 2 WATER monsters from your deck to the graveyard. When this card is removed from the field, add 2 WATER monsters from your graveyard to your hand. If you do, skip your next draw phase. You cannot add cards from your deck to your hand until your next end phase.
“Drown in your own tears, mortals. Disaster Cycle!”

Triumphant Battle Steed, Sleipnir
Level 8 Beast/Effect Earth 2200/3200
Cannot be normal summoned or set. Can only be special summoned if you control a face-up EARTH monster, and you have exactly 7 EARTH monsters in your graveyard. When this card is special summoned, special summon 1 monster from either player’s graveyard to your side of the field. When this card leaves the field, halve the ATK of all face-up monsters on the field, then halve your life point.
“Spirit of the brave warrior, ride to victory once more. Life Surge!”

Incandescent Golden Mech, Armaiti
Level 8 Pyro/Effect Light 2300/3100
Cannot be normal summoned or set. Can only be special summoned when you have 10 or more banished LIGHT monsters. When this card is special summoned, special summon 1 banished monster to your side of the field. When this card is removed from the field, both players send up to 5 monsters from their deck or banished pile to the graveyard. You cannot activate monster effects from the field until your next end phase.
“As long as there’s hope, light will prevail. Radiant Paradise!"

Convicting Abyssal Ruler, Adramelech
Level 8 Dragon/Effect Dark 3200/2200
Cannot be normal summoned or set. Can only be special summoned by having 10 or more DARK monsters in your graveyard. When this card is special summoned, draw 2 cards. When this card is removed from the field, banish all level/rank 4 or lower monsters on the field and in your hand. You cannot activate Spell/trap cards until your next end phase.
“Be bound by the conviction chain, Abyssal Buster!”

Pretty cool, the effects are almost a combination of suppressor dragons and elemental lords, but with cooler effects.
I noticed all the names are creatures from different cultures. Adds to the coolness.

But, I think all their effects should be toned down a bit.

Maelstrom and Feng Huang nuke the field if destroyed/tributed on your turn. The ATK also seems too high.

Ouroboros looks OK, except for the last effect, shouldn't exclude WATER monsters IMO. It already is enough search power.

The last 3 are cool.

Ok, balanced Maelstrom, Feng Huang, and Ouroboros.