Charlie's words left Arlo seething, but at that point, he couldn't even spare the energy to curse Charlie, let alone attack him in retaliation.
Initially, he had been thrilled to witness the miracle of his left hand growing back firsthand.
How could he have known then that Charlie was going to make him suffer the pain of losing his hand a second time?!
Worst of all, Charlie was much less merciful than the Three Elders.
In the end, the Three Elders were basically his granduncles, and therefor