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Message: <blockquote data-quote="Sepulchrave II" data-source="post: 3042872" data-attributes="member: 4303">No. Cost for permanency is based on the Unmitigated Spellcraft Prerequisite x250. This means that a big spell (say a ritual with 5 participants, lots of mitigating factors, with a USP of 100) will cost 25,000 XP to make permanent. As Cheiromancer points out, it's based off of the permanency spell's 500 XP/level. To develop and then cast such a spell immediately afterwards would require a 29,000 XP investment (30th- level at the earliest); alternatively a 26th-level developer could wait before casting until just shy of 27th-level. In either case, it would strip an entire level's worth of XP from the caster.There again, you can do some pretty cool sh*t with a USP 100 spell.  I had considered adding an additional +20 to the Spellcraft Prerequisite to allow it to be made permanent (emulating a seed with permanency as the root spell) but decided against it: effectively you'd be charging the caster twice for the same effect, and that seemed too much like a permanency supertax.Remember that because of the dispel seed  'permanent' doesn't really mean permanent. D&D has another word for that - instantaneous  <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f615.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":confused:" title="Confused    :confused:"  data-smilie="5"data-shortname=":confused:" /> .</blockquote>