Sky Spirit Dragon

[SingleCardDiscussion]

[Rayzuke]

This is a rather interesting choice for a card effect. While negating the effect of a attack is by no means a game-breaking effect it is rather underpowered for a 10 Star monster.  The most notable effect however is "This effect can be used only once per GAME" . Now I am not sure if this is a typo or if this is the actual intended effect. What I believed you meant to write down is: "this effect can be used only once per TURN". With the Current effect it would function like "Suijin", "Sanga of the Thunder" and "Kazejin" That can lower the ATK of a attacking Monster to 0 once per game. 

 

Of course this card might be a reference I am not getting in which case just ignore me.

[Dokutah]

Assuming that once per game is meant once per duel:

- When this card is targeted for attack: you can toss a coin; if its Head, Negate the Attack. You can only use this effect of "Sky Spirit Dragon" once per Duel -

1) that stat and effect is way too weak for Level 10

2) i dont see why a mere attack negation is worth once per Duel clause. In fact its actually extremely rare for a card to have an effect worth of such limitation. 

3) You make this as Spirit Monster Subtype (the one on the left) but lack of Spirit Monster effect

4) Spirit type (the one on the right)  is not exist irl. Please change it into the game proper types