On TheOtServer, the moment you are promoted you gain part of another promoted player's experience when you kill them. Use the calculator to see what a kill is worth.
⚔ PvP Experience Calculator
Example: a level 200 player who kills a level 500 promoted player gains about 20 levels. Drag the sliders to try your own.
+20.0 levels
about 2% of their experience
No skull
Shown for a solo kill. In a group, the experience is split between attackers by the damage each one deals. Killing the same player again soon pays half as much each time.
How PvP Works
Level 1–100
Protected
Players cannot attack you. Choose your vocation at level 100. Reborn players are the exception: promotion ends this protection forever, at any level.
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Level 100+
Open PvP begins
Anyone can fight outside Protection Zones, but kills give no experience yet.
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Level 300
Promote
The Queen resets you to level 2; skills, magic level and items stay, plus new spells. Then climb back up.
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Promoted 100+
PvP experience
Now you gain experience for killing other promoted players too - an extra way to level on top of normal hunting.
SkullsYou get a frag for killing a player who did not attack you first, unless it is a fair fight between two promoted players, or the target already had a skull
White Skull
Shown when you attack another player. While it is up, anyone may fight back and killing you earns them no frag - and you cannot enter a depot or Protection Zone, nor teleport to safety, so there is no hiding right after a kill. It lasts about 15 minutes (10 for merely attacking without a kill).
Red Skull
Marks a player killer at 10 unjustified kills as a promoted player (5 if not). While red, you drop everything you carry when you die, and an Amulet of Loss will not protect it.
Black Skull
The most severe tier, reached at 20 unjustified kills promoted (15 if not). The same total item loss as red, and you also revive with almost no health or mana.
Each unjustified kill fades after 24 hours. With a red or black skull you drop everything you carry on death, and an Amulet of Loss will not protect you. Type !frags in game to check your own frags and the time until the next one wears off.
More details
Both players must be promoted. A non-promoted player gives and gains no PvP experience.
Self-defence gives full experience. If a player attacks you first, you gain full experience and no skull, at any level difference.
"Much lower" means under 67% of your level. Below that line you get an unjustified kill and almost no experience; at or above it the fight is fair.
A "big level gap" means the target is over 1.5× your level. That is where the 20-level cap and the half-on-repeat rule apply.
Summons give experience to their owner, never to themselves, and the same applies to monsters.
Below level 100 you cannot be attacked by players and lose nothing when you die.