@katanalauncher: Taming is not a feat of destruction so using that terminology is flawed, and not only that, but Ame can basically copy any ability when it is used, so even if the dragon arm activates, Ame would copy and tame the dragon as well as gain information on it, which will give Godou the necessary conditions to use the warrior, which negate the ability.
Also that arm is a dragon from what the novel said.
If Godou uses the warrior, while imagine breaker can maybe hold it off, the warrior can combined with the stallion becoming as strong as the sun and as fast as light or even faster and well as a shape-shift to anything. (like say a a serpent that can attack him before he can put imagine breaker up to defend himself.)
@CosmicKnight75: The stats that he can are speed and strength as long as he does not come into contact with the arm although considering Godou's speed and fighting style was well as experience, which all of these stats are all amplified by the warrior, so he would go from being sun level a higher level, and hitting touma with the full force or anything amplified by the warrior is instant death.
Again it matters because saying he can tame any dragon is NLF, maybe he can tame any dragon shown, but you can't assume he can tame Dragons stronger than the strongest dragon he has tamed.
Otherwise anytime a character have a vaguely defined ability with no shown limit is as strong as TOAA.
The arm have only been visible in Academy city, some theory is that the aim field have given it's form. It also just have the shape of a dragon head, can't even classify it as a dragon.
But again the point is null, unless he have shown be able to tame dragon with Sun+ level DC, he isn't gonna do jack to invisible thing, even if it's classified as a dragon.