Sorry I couldn't send you any stuff, but I got really busy with work and other things and totally forgot. But it sounds like you had a good time, freaked out the PCs and players, and achieved exactly what you wanted. Nicely done!
Hey, no worries, mate! I wanted to see what they could do now they've hit the magic level 6 - extra feats, second attacks, plenty of hit points, better equipment ... I got just what I asked for. Now I'll have to throw them a few easy encounters or they'll end up levelling way too soon
Still, that'll give them a nice overblown sense of their own power before I kick ass again. A kraken, you said?
One other possibility, which would likely scare the crap out of the PCs, is to hit them with something way out of their league and have it fight till it's hurt and flee. A kraken would be a good option for that.