WIP: Xyz-killing "Ekranoplan"s

[Stan Alda]

I'm working on a trio of cards based on ekranoplans/ground effect vehicles ([url="http://en.wikipedia.org/wiki/Ekranoplan"]http://en.wikipedia....wiki/Ekranoplan[/url]) as anti-Xyz monsters. While I intend on posting the finished results in Realistic Cards (I've got the pictures already), I would like some help in making balanced effects beforehand. These are rough drafts of the effects I intend, and I would like advice on how to refine them: card grammar, balance, anything.

All of them are both WIND and WATER monsters, but they're not meant to really [i]support[/i] either attribute so much as [i]fit in to[/i] either attribute. Instead, they are designed to come out quickly in response to Xyz Monsters and either kill them or hamper them somehow.

[b][i]Hunter-Killer Ekranoplan[/i][/b]
WIND
Level 7
Machine/Effect
This monster is also treated as a WATER monster. When your opponent Xyz Summons an Xyz Monster from their Extra Deck, you can Special Summon this card from your hand in face-up Attack Position during your next Main Phase. This monster cannot attack the same turn it was Special Summoned by this effect. When this monster declares an attack on an Xyz Monster, this monster's attack cannot be negated. When this monster destroys a non-Xyz monster in battle, destroy this card. When this monster destroys an Xyz Monster in battle, return this monster to your hand.
2700/2300

[b][i]Emergency Ekranoplan[/i][/b]
WIND
Level 5
This monster is also treated as a WATER monster. When your opponent declares an attack with an Xyz Monster, Special Summon this card from your hand in face-up Attack Position. Your opponent attacks this monster instead. This monster's effect cannot be negated. You cannot declare an attack with this monster during your next turn after this monster was Special Summoned from your hand.
2400/1900

[b][i]Caspian Sea Monster[/i][/b]
WIND
Level 8
"Emergency Ekranoplan" + "Hunter-Killer Ekranoplan"
This monster is also treated as a WATER monster. This card can only be Fusion Summoned from your Extra Deck by returning the above cards you control to the Deck. (You do not use "Polymerization".) When your opponent Xyz Summons a Rank 6 or higher Xyz monster from their Extra Deck, you can Special Summon this monster from your Extra Deck in face-up Attack Position during your next Main Phase. When this monster destroys a non-Xyz monster in battle, destroy this card. When this monster destroys an Xyz Monster in battle, return this card to your Extra Deck.
3200/2600