Hopefully Realistic Set [D&D Influences] [5/?]

[ImmortalD]

Well, it's actually been ages since I last was on here, posting Yu-Gi-Oh! cards. Back then, we didn't have Xyz; so you'll have to forgive me if this set's one is a little off.
 
Please let me know if any of the cards are OP/UP or Broken and also I welcome Constructive Criticism, but Flames will be sent to the Incinerator.
 
As always; Lore Corrections are greatly appreciated.
 
Elemental Dragon - Dark

Lore: This card cannot be targeted by LIGHT-attributed monsters during your opponent's Battle Phase, however you take Direct Damage equivalent to that monster's ATK. If this card would be destroyed as a result of battle, you may pay 1000 LP to return it to your Deck instead, then shuffle your Deck.

Elemental Dragon - Earth

Lore: You may negate the attack of one of your opponent's Monsters during your opponent's Battle Phase, however at the end of the turn that this card's effect is activated, it is sent to the Graveyard

Elemental Dragon - Fire

Lore: When this card is destroyed by an Opponent's Monster, you may pay 1000 LP to deal 1000 points of Direct Damage to your opponent.

Elemental Dragon - Water

Lore: You may send this card to the Graveyard to negate the effect of any PYRO-type monsters on the field during your Battle Phase. This effect can only be activated once per game.

 

Elemental Dragon - Wind

 

Lore: This card cannot be destroyed as a result of Battle, however all Damage Calculations are applied as normal. This card cannot attack during the turn that it is selected as a target by an Opponent's Spell, Trap or Monster Effect.

 

Tiamat - Goddess of Evil Dragons

 

Lore: 5 DRAGON-type Normal Monsters
You may reduce this card's ATK by 1000 to deal one extra Attack during your Battle Phase. If this card would be destroyed as a result of card effects, you may detatch one DRAGON-type Xyz Material and destroy that instead.

EDIT: I can't seem to get my spoiler's working today, it just breaks for Tiamat and doesn't show her in a spoiler; so I removed the lot. Sorry about that =/

[PandaBlackOps]

Well the Set is a little underpowered and how come Tiamat require Level 8 normal monster to summon it when most of the archetype monsters are Level 4 effect monsters. Also most of the cards effect don't seem to flow together. They have seem to have separate purposes. Here's an example you can make it so that each attribute of the card cannot be destroyed by the same attribute by battle or something. Well hope my opinion matters.