A Thrower Troll is a troll that attacks with ranged. They are relatively annoying monsters that throw rocks at passing adventurers, regardless of being engaged in combat or not. They are rarely ever on their own, preferring to be together in groups. They can hit very accurately, even against higher-level armour. Although each troll's attacks are slow, players usually come under fire from several of them at once. A Fremennik round shield can reduce their max hit (below about 160), but this method is seldom used because people prefer using other shields or activating Protect from Missiles.
For a while after the Evolution of Combat, Thrower trolls near the God Wars Dungeon entrance were unagressive. This was later fixed.
Before the Instanced God Wars update, when a Thrower Troll attacked a player, the player was not in the combat stance. It was later fixed with the aforemented update.
Thrower trolls seem to have a 100% damage accuracy against players regardless of armors, suggesting that they have a Ranged level of 85 or higher, since monster accuracy is dependent on the monster's combat level and skill level.