from dbzcardgame.com

One use for this card that some might not immediately see is that it can help Blue ally decks.  I have a good friend who plays a Blue ally deck, but has level 2 allies inside it.  He needs anger to bring them out, and this can help him out in that regard.  While it's true that the extra anger only comes if your opponent declared a Red tokui-waza, that's actually the deck type you want to play against when you do allies (plenty of allies means many stages of damage needed for any life cards to be dealt).  So far, Red's been mainly physical, and though this expansion will soon lean more to energy for that style, I think Red will keep to tradition in tournaments and stick with power stages, making your ally deck a tough force to fight against.

Chances are, though, that you're not going to include level 2 allies in your decks, nor is it probable that your opponent will play Red (1/6 chance, not likely).  If you're going to do an ally deck, you might consider putting this in your sensei deck, but I wouldn't make it a high priority.

S: 3.1     TE: 3.5

Rating: 2.3

Blue Thunder Flash not only has an awesome picture, but it also has an incredibly annoying name that took me 50 tries to type ^_^ It seems that blue is getting a lot more power in the anger department, and that is probably because of the new mastery which is rumored to be based around anger. Its an energy attack doing 5 life cards, and if you declared a tokui waza, and your opponent declared red, you raise your anger 2.  Theres the kicker that makes this card seemingly useless. Your opponent must declare red. If not for htis part, it would be a good card, but then again, that part is there, so its not as good. It may not be a good idea putting 2-3 of these in there, it will be a wasted card if your opponent doesnt declare blue. 

*Score*
Standard: 2/5
Tough Enough (yes, i spelled it right, just getting back to school...) - 2.5/5

Tuff Enuff ~ 2.5 This card could be good if you are playing a red deck but there are other blue cards that do large ammounts of life cards that aren't so risky because of the sensei element.