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<blockquote data-quote="nittanytbone" data-source="post: 2785896" data-attributes="member: 35709">How does Use Magic Device work?This is how I THINK it should work.&nbsp; Let me know how I'm wrong.Gord the Rogue has a +7 UMD check.&nbsp; He wants to use a mage scroll of &quot;fly&quot; (3rd level spell).Here's how scrolls work from the SRD:&nbsp;Ok, the last one is easiest (have the requisite ability score).&nbsp; Gord has Int 14, so he has the requisite ability score.The middle requirement is tougher.&nbsp; Gord has to make a UMD check DC 20+spell level to meet this requirement (have the spell on his class spell list).&nbsp; That means he needs a 23, and with a +7 check he needs a 16 or better on his D20 roll.&nbsp; Let's say that he makes his roll.The final requirement is a caster level check.&nbsp; Gord's level in wizard is 0.&nbsp; So, he can make a CL check DC 6 (effectively just a D20 roll), or he can make a UMD check to &quot;Emulate a Class Feature&quot; (i.e., wizard level 5) DC 25.If he passes this roll, the spell goes off.Is that right?What happens if a roll is failed?&nbsp; Is the scroll lost?&nbsp; Does he have to make a DC5 wis check to avoid a mishap?&nbsp; Is UMD actually useful, given the high check DCs and inability to take 10 on rolls?</blockquote>

[QUOTE="nittanytbone, post: 2785896, member: 35709"] How does Use Magic Device work? This is how I THINK it should work. Let me know how I'm wrong. Gord the Rogue has a +7 UMD check. He wants to use a mage scroll of "fly" (3rd level spell). Here's how scrolls work from the SRD: Ok, the last one is easiest (have the requisite ability score). Gord has Int 14, so he has the requisite ability score. The middle requirement is tougher. Gord has to make a UMD check DC 20+spell level to meet this requirement (have the spell on his class spell list). That means he needs a 23, and with a +7 check he needs a 16 or better on his D20 roll. Let's say that he makes his roll. The final requirement is a caster level check. Gord's level in wizard is 0. So, he can make a CL check DC 6 (effectively just a D20 roll), or he can make a UMD check to "Emulate a Class Feature" (i.e., wizard level 5) DC 25. If he passes this roll, the spell goes off. Is that right? What happens if a roll is failed? Is the scroll lost? Does he have to make a DC5 wis check to avoid a mishap? Is UMD actually useful, given the high check DCs and inability to take 10 on rolls? [/QUOTE]

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