And what of this being who pretends to be Samil? You can understand why the A'Dendri would want you here but what about him? If his lies truly led Kharnus to drink from this so-called 'Life Stream', thereby giving birth to the Deepwood, then why would he summon you here to destroy his creation? There is something you are not being told.
You level the question at the entity wearing Samil's visage. He offers you a serious glare, choosing his next words carefully. "You are here to make a choice. A choice that must be real. There is power in lies, but far more in truths," he replies disdainfully. "So, you must be told the truth, to decide freely. Only then will it have the power needed."
When you ask him to explain what choice he refers to, Samil slowly turns and peers at the thing writhing inside the great amber stone buried in Kharnus' chest. "The only choice that has ever mattered, of course. The choice to set me free."
A deep groan suddenly emerges from the slumbering giant, shaking the earth. He is slowly waking! At the very same moment, you hear the scrabbling sound of the great horde returning from their feast at Raven's Reach. They will be upon you soon. You have only a few precious minutes to learn as much as possible from the being disguised as Samil.