Black Shiver, Gavrail
If a total of three or more new cards were put in the damage zone, all of your front row units get +10000 Power!
Then, return a card from the damage zone to your hand, put one card from the damage zone under the deck, and take two damage!
The key is to aim for trigger effects while increasing hand size and strengthening units in the front row!

Black Observe, Hamiel
When placed, if you have a vanguard with ""Black"" in its card name, call a card from your damage zone and take one damage!
Also, when it attacks, at the cost of 3 Counter-Blasts, it gets +15000 Power, +1 Critical, and your opponent cannot call sentinels from hand!
In return for paying a lot of Counter-Blasts, you get super powerful skills! If you obtain a trigger effect, you get to become a more powerful attacker too!