Elros bares teeth in what is not a smile. His is the most dangerous job, the part of bait - and he argued long and hard about it earlier. But he is the great-grandson of Luthien, and although he is mortal now, he still has more power than any normal human. And he has the experience of the past to draw on.

(Also he's the king and can overrule them. That too.)

"We've fought greater dragons than you, beast! If gnat I be I have still sting enough to move you, so much lesser than your ancestors!"