Arrow Eruptions states that:
You create exact duplicates of the arrow or crossbow bolt you used to kill a creature in the previous round and launch one at enemy
creatures within a 30-foot radius of the corpse. You can target one
creature per caster level (maximum 15) within range of the burst and
must make a single attack roll and apply it to each arrow. These
duplicate arrows possess all the intrinsic magical properties of the
arrow that killed the original creature as well as those passed on
to it by your bow. They also enjoy the full benefit of any bonuses or
modifiers you applied to the attack from other magical items, feats,
and class or racial features. However, this spell cannot reproduce any
spells or other limited-use magical effects that you used to enhance
that particular attack. This includes such effects as the true strike
spell, as well as any area spell you might have placed on the arrow by
means of the arcane archer's imbue arrow class feature.
And Arrow of Death, an Arcane Archer (Prestige Class) ability states that:
At 10th level, an arcane archer can create a special type of slaying
arrow that forces the target, if damaged by the arrow's attack, to
make a Fortitude save or be slain immediately. The DC of this save is
equal to 20 + the arcane archer's Charisma modifier. It takes 1 day to
make a slaying arrow, and the arrow only functions for the arcane
archer who created it. The slaying arrow lasts no longer than 1 year,
and the archer can only have one such arrow in existence at a time.
My question is, can you use Arrow Eruption to duplicate an Arrow of Death shot the last round? How will the two spells work with each other, if at all?
Best Answer
No.
Funnily enough, it comes down to this line.
This makes the arrow a
which means the Slaying ability of the arrow is not duplicated by Arrow Eruption.
The intent is clear and would disallow this, and thanks to that line, the RAW is, too.
You would duplicate the enchantments on the arrow, any bonuses granted by your feats or class abilities that are not limited-use magical effects or spells, and otherwise treat the duplicated arrows as the arrow you used, but without the slaying property or any other limited-use abilities or spells applied to it.