The Overlord and Storm King form an alliance/Defeating the Giant Stone Warrior

This is how The Overlord and Storm King form an alliance and Defeating the Giant Stone Warrior goes in Shadow of the Overlord.

[The Storm King washes on shore to an island]

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[A voice

The Overlord: I've been waiting for you.

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The Storm King: Who are you? Where are you? What is this place? Where am I? This isn't Equestria.

The Overlord: It is the place you were always meant to find. Destiny brought you here.

The Storm King: [] This... This is the Dark Island! The one mentioned in Skull Grinder's log. [] But who are you?

The Overlord: I go by many names. But you may call me Overlord.