A player on an Overdrive megastreak.
From the Hypixel Pit Wiki
Overdrive is a megastreak in the Hypixel Pit. It is the only megastreak that has no prestige or level requirement. Overdrive is unlocked and enabled by default. Like most other megastreaks, it is a killstreak that triggers on 50 kills.
While the megastreak is active, the Overdrive megastreak has three perks: When the player's megastreak is active, the player will receive +0.1♥︎ of true damage per 5 kills above 50 from all hits received. After the player dies, they will receive 4,000 XP.
Despite being the first unlocked, Overdrive is one of the best megastreaks for XP available until To the Moon is unlocked at prestige XIV.