Deathmatch is a Polearm in Genshin Impact that boosts your Crit Rate, your ATK and DEF Stats depending on enemies nearby! You can get this weapon as a Battle Pass Reward! Its special effect is Gladiator:

If are there at least 2 enemies nearby, ATK increased by 16% and DEF increased by 16%. If there are less than 2 enemies nearby, ATK is increased by 24%.

Builds that can use this Polearm are: