Endless expert is a challenge from KronicSauce. We play 100 man Expert until we run out of 100 total lives. Basically, when we start the challenge, we have 100 lives. How ever many lives we have after finishing the 16th level is how many lives we have to start the challenge. This keeps carrying over through multiple challenges. We keep going until we have finally lost 100 total lives. Lives past 100 do not count; if we gain lives over 100, we stay at 100 total lives.