"Brilliant!" cries Talsarios, the aforesaid Thyatian scholar. "Good knight, there's no less than a goblin king and his bodyguard here that needs your sword's attention! Do your worst!"
With that, Alastor backs off to let the mailed fighter through, and fishes his sling out his belt again and check the bullet is loaded, muttering "... rather I mean, do your best, dammit. Silly."
Spoiler
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If he gets a clear shot, Alastor will take it. Otherwise, he waits to help in any other way he can.
Talsarios MU1, HP 1/1, AC9, THAC0 19
sling attack - (1d20)[11] (if possible)
damage - (1d4)[1]