Ghost Behemoth [7/??]

[Sidepipe]

All right, without further ado...

[spoiler=Cards 1-5]
Ghost Behemoth - Cosmic Guardian
Level 11 - Beast/Synchro/Effect - DARK
ATK: 3000 - DEF: 3900

"Ghost Behemoth - Psychic Aligner" + 1 or more non-Tuner Synchro monsters
Once per turn you can pay 500 Life Points to switch the ATK and DEF of this card. Up to twice per turn you can discard 1 card to negate the activation of a Trap Card and destroy it. All Beast-type monsters gain 400 ATK and DEF. During battle between this attacking card and an opponent's monster whose DEF is lower than the ATK of this card, inflict the difference as Battle Damage to your opponent. When this card is destroyed, you can Special Summon 1 Level 4 or lower Beast-type monster from your Graveyard or Deck.


Ghost Behemoth - Psychic Aligner
Level 6 - Beast/Synchro/Tuner - DARK
ATK: 2000 - DEF: 2000

1 "Ghost Behemoth" Tuner + 1 or more DARK monsters
During battle between this attacking card and an opponent's monster whose DEF is lower than the ATK of this card, inflict the difference as Battle Damage to your opponent. When this card is destroyed by a card effect, you can Special Summon it during your next Standby Phase by paying 1000 Life Points. When this card is used as a Synchro Material monster, remove it from play instead of sending it to the Graveyard.


Ghost Behemoth - Gray Enforcer
Level 4 - Beast/Effect - DARK
ATK: 1000 - DEF: 1000

During battle between this attacking card and an opponent's monster whose DEF is lower than the ATK of this card, inflict the difference as Battle Damage to your opponent. Once per turn, during the Main Phase, you can discard 1 card to double this card's ATK until the end of your opponent's next turn.


Ghost Behemoth - Stone Scythe
Level 3 - Beast/Effect - DARK
ATK: 1200 - DEF: 0

During battle between this attacking card and an opponent's monster whose DEF is lower than the ATK of this card, inflict the difference as Battle Damage to your opponent.


Ghost Behemoth - Magma Lancer
Level 5 - Beast/Effect - DARK
ATK: 2000 - DEF: 900

This card's Attribute is also treated as FIRE. During battle between this attacking card and an opponent's monster whose DEF is lower than the ATK of this card, inflict the difference as Battle Damage to your opponent. You can remove this card from play to add 1 "Volcano Fusion" from your Deck to your hand.
[/spoiler]
[spoiler=Cards 6-10]
Volcano Fusion
Spell Card - Normal

Remove EARTH and FIRE Fusion Material Monsters that are listed on a Fusion Monster card from your hand, your side of the field or your Graveyard from play. Fusion Summon the Fusion Monster from your Extra Deck. It's ATK and DEF are increased by 500.


Ghost Behemoth - Vulcan Buster
Level 8 - Beast/Fusion/Effect - DARK
ATK: 2000 - DEF: 2500

"Ghost Behemoth - Stone Scythe" + "Ghost Behemoth - Magma Lancer"
This card cannot be Special Summoned except by the effect of "Volcano Fusion". During battle between this attacking card and an opponent's monster whose DEF is lower than the ATK of this card, inflict the difference as Battle Damage to your opponent. You can decrease this card's ATK by 500 to pick up 2 cards: 1 from the top and 1 from the bottom of your Deck. Add 1 of those cards to your hand and remove the other card from play.

Rest coming soon!

[/spoiler]

Any tips or feedback?

[TCG warrior]

maybe write vulcano fusion a bit different and 1 less place to get the materials from (otherwise it could be a bit overpowered), I would say:
Remove from play, from your side of the field or your Hand, Fusion Material Monsters that are listed on an "Ghost behemoth" Fusion Monster Card, and Special Summon that Fusion Monster from your Extra Deck. (This Special Summon is treated as a Fusion Summon). The fusion monster fusion summoned with this card gains 500 ATK and DEF.

And for the "first" fusion monster you should write "draw" in stead of "pick up"