Takes place in existing pvp maps and awards crucible reputation and marks. Enemies drop no loot. And ammo comes from boxes just like normal pvp. Each wave gives 2 crucible rep. Every 5th wave completed gives 3 crucible marks. After 10 waves you face a random boss. Lvl 20 and 24 difficulties give guaranteed random blue engram drops from bosses. Lvl 28 bosses drop legendary or better engrams. After each boss wave a random skull gets turned on. Random thought I had in a different discussion. It would be a fun change of pace and would help people who don't like pvp to get rep and marks.