This is my first review so please give any suggestions on how this could be better.
This card is amazing. For a clan that is focused on giving an onslaught of attacks, this card certainly fits. Usually, cards like this have a limit break to stop it from doing extreme damage in mid game, but this card was made before limit breaks even existed. His skill is that anytime it hits, you can counterblast 2, discard two novas, and stand him and his booster to lose twin drive. It may seem like a hefty cost, but it should have been heftier.
Stern Blaukluger can put on a ton of pressure on turn 3. Even if you have no cards in your hand, as long as you have two damage, his effect can work after his twin drive. Imagine you're at four damage, and you have no cards in hand, and your opponent is at three damage and can't guard. Once you draw for turn, you have 1 card in hand. After you twin drive, you'll have three. Then if you discard two to attack another time, after the drive check, you'll end up with two cards in hand, so you can attack AGAIN. That's three attacks from the vanguard in one turn when you had no cards in hand at the start of your turn.
Strategies and game play:
If your opponent doesn't guard, and you can re-stand your vanguard, add all the effects from triggers you pull to your vanguard, making it near impossible to guard each time.
Combos with other cards:
Dancing wolf if probably the best booster you can put behind Blaukluger. When he stands during battle, he gains 3000, making him a 10k booster. If your opponent makes the mistake of letting your attack through, you can put a ton of pressure with a 21k column.
Ways to counteract it:
Guard against him as much as you can, and NEVER, and I mean NEVER, let stern's attack go through when they're at 4 damage. Try not rush a stern deck since they can inflict 4-6 damage afterwards if you put them at 4 damage too quickly. Don't rely on getting damage triggers to help guard easier, because they're probably gonna pull a trigger, add the power to stern, and re-stand him, along with wolf making a 26k column, which didn't exactly help your guard.
If you get it to hit, you'll certainly dish out a ton of damage after you stand it. It can put a ton of pressure, so it may let your rear guards go through, still dealing damage either way. You can pull of the combo even if you have no cards in hand.
You lose hand advantage, but that's if you even had any in the first place.