Other Captains come with Greblak, we go yell at tribe to make ship go!
Greblak won't actually go out to address the crew unless someone else comes with him. If someone does, he blasts a ray of fire into the sky to get the tribe's attention.
Gullchokers! Captains is big chief now! Captains say make ship go now!
Greblak tries to look all scary and mystical as he says this
Intimidate check:1d20 + 7 ⇒ (2) + 7 = 9
Well, he is a goblin, there's a limit to how scary and mystical he can appear, apparently