Hello,
The following elf domain ability:
"Elven Aim: Nearby allies in a colossal radius have their ranged weapons receive +1 non-magical AB, ranged ammunition receives +1 magical damage and +1 piercing damage for 5 + 3*CHA turn."
https://wiki.efupw.com/index.php?title=Turn_Undead#Elf_Domain (https://wiki.efupw.com/index.php?title=Turn_Undead#Elf_Domain)
Does not last turns but rounds.