Heh, it seems like some people thinks Kuriboh stops attacks. Kuriboh only stops the damage to your life points or maybe you could say buffers it. It technically doesn't even reduce all battle damage to zero, just the part that hits your life points. The monsters are still destroyed in battle. If Kuriboh is used on the first attack to stop the overflow damage it doesn't prevent Black Luster Soldier from attacking again. All BLS needs to do is destroy a monster in battle to get its attacking effect and that is what it would be doing.