Servers tagged 1.8 PVP focus on the pre-1.9 combat system: no attack cooldown, spam-clicking, rod/arrow combos, block-hitting, and faster movement-based fights. They’re usually minigame or PvP-network style servers (duels, practice, kitpvp, bedwars/skywars) and often run on 1.8.x or use plugins to emulate 1.8 combat on newer versions.