From Destinypedia, the Destiny wiki
Mayhem Clash is a variant of the Crucible match type Clash introduced in The Taken King. The modifiers are that abilities such as grenades, melee attack charges and super attacks will recharge significantly faster than normal, special ammo and heavy ammo crates spawn much more frequently, and all point values are multiplied by 10. All other factors of the Clash game mode are unchanged.
List of appearances