Gnoll Wood is a six player map made by Blizzard for WarCraft III: Reign of Chaos and The Frozen Throne. The Reign of Chaos version had Mercenary camps instead of Taverns. There's 50% chance to have either a Fountain of mana or Fountain of health in the middle of the map.
Official Map Description
Prepare your defenses quickly; the enemy draws near. Be careful when scouting the river's edge; Golems are lurking in the hills.
The Gnolls at shops that drop items are generally rushed with Agility heroes such as Blademaster and Demon Hunter in order to efficiently harass the ennemy when equiped.