Arrow of Spell Trapping

Note this spell is an Adaptation of "Conduit"  A spell originally found in the "Complete Book Of Elves" (Brown Book) 2nd Ed. 

With this spell the caster can trap any spell within the head of a well crafted arrow. When the arrow hits, target the spell expends itself as though cast by a mage of half the level of the spell slot used to cast the original spell. ( where damage is concern)  level wizard. This effect duration range or any other property of the spell calculated by the casters level. Any spell works on this as long as the caster has the ability to cast that spell. 

Casting time is 10 minutes + the casting time of the spell trapped. Wizard who casts this spell DOES NOT need to be the one who casts the trapped spell but must work in close collaboration with  the caster and stop his spell once the arrow is open to the trapped spell, and must maintain concentration while the second caster casts her spell at the arrow, at which point the Caster must pick up where he left off to close the trap around the trapped spell.  this allows you to create arrows of any classes spells, as long as you have a member of that class of sufficient level to work in collaboration with. 

This spell will be helpd within the arrow until fired be that they next moment or 10,000 years into the future.  

DC10 (DC15) when casting with a second caster. 

Physical componted is a high quality arrow and the Components for the spell to be trapped.