i used to play TDS but no longer play it... but i remember that "frozen boss" or whatever it was called that had like icy spikes and scratches with some iron chains or whatever and not only did it have 2 gajillion health but also moved at mach 12 making it impossible to win in many cases
tho that might just actually be the speedy boss itself and i'm confusing it with something else
I stopped playing TDS awhile ago. Before the lobby changed and before all this cool stuff. it was plain simple. They even had versus mode, but that got removed somewhat fast.