Cheaper than a feat.
Arrow DemonOf all the things possible with the polymorph spell, spending it on an archer so as to boost his str has to be one of the worst uses ever...
Come on... Admit it!
We have a bow that can survive being sundered by an Orc with a Greataxe. I think the spike will be ok.Before making any hasty decisions, I suggest you ask the spike first whether it can live through the impact.
Great! Then that should make the task easier!As for your Hardness and HP remark, let me clarify: It is irrelevant. You are not asked to break the rocky surface underneath your feet, you are asked to shove a spike in it.
Holy moving goalposts, Batman!...But in case someone can truly pull this off... then... what can I say... He's probably wasting his talent being an archer.
SRD said:The new form may be of the same type as the subject
I edited that info in actually after my own research, although the timestamp could of course say I changed it after you posted.@Jackinthegreen
If you are already an Outsider, you can polymorph freely into other Outsiders, such as Arrow Demons.
A rereading of Bone Bow leaves me wondering if it actually auto-adjusts to your strength modifier. It is possible that it does not.

We have a bow that can survive being sundered by an Orc with a Greataxe.
Symmetrical Archery (Ex): The arrow demon has an amazing ability to wield two bows at once in unison. Any time the arrow demon could make a single attack with a bow, it can attack with both of its bows, at -2 on all its attack rolls that round. For example, when making an attack action, an arrow demon can fire one arrow from each bow at its normal attack bonus minus 2, and when making a full-attack action, it can fire one arrow from each bow for each of its normal iterative attacks (two arrows from each bow, each shaft at a -2 penalty). The statistics block above already includes these bonuses. The arrow demon takes no additional penalties for using multiple weapons as long as it is using only bows.
A body with extra limbs does not allow you to make more attacks (or more advantageous two-weapon attacks) than normal.
This spell functions like alter self... It also gains all extraordinary special attacks possessed by the form...
A +4 Composite Longbow would not be among them, as it costs over 32K.If only I had the time to list the composite bows and other magical trinkets I could buy with 25K!!!
Not in the real world, no. However, we play a game where you can carve out tunnels in solid rock with longswords. (And which seems to lack mechanics for breaking parts off of weapons other then, perhaps, by using Sunder.)That does't give the right to every strong character to pierce hard rock as if it was butter.
Alter Self states:I was wondering which lines override which:
1)Alter Self:
or..
2)Polymorph:
I know this has been discussed to death, but this is not the case of natural attacks (Hydras etc.)
Any ideas?

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.