Item Creation (Ex): An artificer can create a magic item even if he does not have access to the spells that are prerequisites for the item. The artificer must make a successful Use Magic Device check (DC 20 + caster level) to emulate each spell normally required to create the item.
Thus, to make a lst-level wand of magic missile, an artificer would need a Use Magic Device check result of 21 or higher.' To create a bottle of air (caster level 7th), he would need a check result of 27 or higher to emulate the water breathing prerequisite.
The artificer must make a successful check for each prerequisite for each item he makes. If he fails a check, he can try again each day until the item is complete (see Creating Magic Items, page 282 of the Dungeon Master's Guide).
If he comes to the end of the crafting time and he has still not successfully emulated one of the powers, he can make one final check—his last-ditch effort, even if he has already made a check that day. If that check also fails, then the creation process fails and the time, money, andXP expended to craft the item are lost.
For purposes of meeting item prerequisites, an artificer's effective caster level equals his artificer level +2. If the item duplicates a spell effect, however, it uses the artificer's actual level as its caster level. Costs are always determined using the item's minimum caster level or the artificer's actual level (if it is higher). Thus, a 3rd-level artificer can make a scroll of fireball, since the minimum caster level for fireball is 5th. He pays the normal cost for making such a scroll with a caster level of 5th: 5 X 3 X 12.5 = 187 gp and 5 sp, plus 15 XP. But the scroll's actual caster level is only 3rd, and it produces a weak fireball that deals only 3d6 points of damage.
An artificer can also make Use Magic Device checks to emulate nonspell requirements, including alignment and race, using the normal DCs for the skill. He cannot emulate skill or feat requirements, however, including item creation feat prerequisites. He must meet the caster level prerequisite, including the minimum level to cast a spell he stores in a potion, wand, or scroll.
An artificer's infusions do not meet spell prerequisites for creating magic items. For example, an artificer must still employ the Use Magic Device skill to emulate the light spell to create a wand of light, even though light appears on his infusion list.