The artifact file gives the following settings:
Allowed all
chance 15
Object Gorokh
type 15
slaying angel
last_sp 120
value 30
magic 2
msg
This weapon faintly glows with a dark radiance that makes shadows seem deeper and darker than they should be. You have a strong feeling that even the mightiest champions of light must fall to such powerful darkness.
endmsg
item_power 2
end
and
Allowed all
chance 15
Object Valriel
type 15
slaying demon
last_sp 120
value 30
magic 2
msg
This weapon faintly glows with a warm radiance that casts no shadows.
Just holding it gives you the courage to send the most evil monsters back to whatever Hell they came from.
endmsg
item_power 2
end
However, in game, bows and crossbows for these deities does not match these stats.
crossbow of Gorokh +2 (wc+1)(dam+11)(item_power +1)(Firing delay 2.50)(Attacks: physical, acid)
and
bow of Valriel +1 (dam+14)(Firing delay 2.00)(Attacks: physical)
I have not tested this with any of the other cult enchanted missile weapons. I have only found these so far.
Diff:
Summary format edit.
I believe
slayingis overloaded for the type of ammo the missile weapon uses and slaying does not carry over from the weapon to the arrow regardless, so the only way to slay with a missile weapon is to fire a missile of slaying. The slaying field in the treasure definition is therefore ineffective.