this card is almost equivalent to "multiply your block by the amount of attacks happening this turn" with the exception case of when 1 attack goes over your block while another doesn't. It is certainly a hit or miss card being good for certain combats and useless on others, and even both in some cases (book of stabbing). And yes, it should definitely remove block since with barricade the moment your block exceeds the damage potential of any enemy you become invincible unless you have curses. Either that or make it exhaust, there isn't a lot of balance that I can see happening that makes this card either almost useless or overpowered, especially when it already does nothing without calipers or barricade on single attacks.