Sweet!!! so they did put that spell in the book. Rock on!!! Spells of the Woodlands (Cathedral of Leaves)
http://www.wizards.com/default.asp?x=dnd/arch/fw
A link to the Far Corners of the World Archive. Looks like most of the rocken spells made it into spell compendulim.
http://www.wizards.com/default.asp?x=dnd/fw/20040710a
link to splinter bolt.
Keep in mind you have to make a ranged attack. Not a touch attack. But also its cit is 18-20 x3 soo.... its a awsomely sucky spell. You need good dex to make it work.
its also suseptible to damage reduction per a bolt so... it has its drawbacks.
this is how it reads in far corners of the world
Splinterbolt
Evocation
Level: Druid 2, Sorcerer/Wizard 2
Components: V, S, M
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Effect: One or more streams of splinters
Duration: Instantaneous
Saving Throw: None
Spell Resistance: Yes
You cause a long, thin, sharp beam of splinters to lance out of your outstretched hand to strike a target in range. You must make a ranged attack (not a ranged touch attack) to hit the target; if you hit, the splinterbolt deals 4d6 points of piercing damage. The splinterbolt threatens a critical hit on an 18-20 and deals x3 damage on a successful critical hit.
You can fire one additional splinterbolt for every four levels beyond 3rd (to a maximum of three splinterbolts at 11th level). You can fire these splinterbolts at the same or different targets, but all splinterbolts must be aimed at targets within 30 feet of each other and fired simultaneously.
If you cast this spell in forested terrain, the splinterbolts are treated as cold iron magic weapons, and they deal an additional +4 points of damage on a hit.
Material Component: A splinter of wood.