I havent read the summoning text on Five headed god dragon, but can i use Cyber Stein to Summon him?

Your question would have been answered before you could ask it had you done so.

Since I believe in the "Self-help" method of doing things, I'll at least give you this much


Text
The Fusion Material Monsters for this card are any 5 Dragon-Type monsters. This monster cannot be Special Summoned except by Fusion Summon. This card does not take any Battle Damage and cannot be destroyed by battle with an EARTH, WATER, FIRE, WIND, or DARK monster. (Battle Damage is still inflicted to players.)

I'm sure someone else will come in and provide some needless restatement, but this is all you need.

hope this helps

0-)

Haha thankyou.....I now know it cant. But i can future fusion is :)

Of course you can...since Future Fusion is considered a Fusion Summon as is Dragon Mirror...anything that is a Fusion Summon or at least states that it is treated as a Fusion Summon will allow you to summon Five God Dragon (or any Fusion Nomi monster)