Game
Power-Ups
The Splegg gun was the only honorable weapon in play, but — while frowned upon — 10 power-ups could turn a round on its head — a mix of offense, mobility, and outright chaos.
10 power-ups · hover for a symbol
Shotgun
Fire 3 eggs each shot for 5 seconds
Demoman
2 pieces of TNT for you to place anywhere on the map
Acid Rain
Snowballs rain from above and destroy the blocks they hit
Rapid Fire
Shoot faster for 5 seconds
Explosive Ammo
Every hit within 3 seconds causes a small explosion
Triple Jump
Allows you to jump 3x the height for 15 seconds
Invisible Man
Makes you invisible for 15 seconds (perfect to run away)
Forrest Gump
Run faster for 15 seconds
Possession
Possess all other players but yourself, putting pumpkins on their head for 3 seconds
Suicide Sheep
A suicide sheep for you to deploy whenever you want!
Alongside the round-time power-ups, eliminations earned tokens spendable on cosmetic upgrades between matches — the one confirmed example named on Hive's own page is a disco sheep. No full shop catalog beyond that has turned up in this archive's sources.
Source: HiveMC's official Splegg page, archived 8 April 2021 — a week before shutdown. If you have the token shop's full price list or item catalog, see Sources.