Skulled

Being "skulled", where you display a skull and crossbones over your head, is a punishment from Saradomin, for breaking the faith and attacking another player in the wilderness. Remember, it is for striking the first blow, arrow or spell in any player conflict, not for a successful kill.

Your three most expensive items carried are no longer protected if you die, though you can save the most expensive if you can use the Protect Item Prayer. This also makes you a bigger target for other player-killers, since they will get more loot if they do kill you.

After around 20 minutes without attacking another player (other than by auto-retaliate), you will be back in favour with Saradomin.

Those fighting in the Melee style will sometimes goad their opponent into attacking them, to avoid being skulled themselves, but the Mage or Ranger really needs to strike first from a distance, so this particular tactic will not work well for them.