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Wiki - Trust of the Tribes

Mynlidia The Tribunal keeps the peace in Eacotura.  To this end she is willing to offer a reward to those to prove their friendship to the indigenous people.  Travel to each of the four tribes and speak to the Chieftains. Each will present a way to earn their tribes thanks.  Return to Mynlidia to receive a reward.  Rewards can be seen in the tribunal's tent.

Moonstone Crystal

Among the rewards for this quest is the Moonstone Crystal.  When locked down in a players house it becomes a teleporter that will take players who double click on it to several locations in Eacotura.