The Sixth Book of Hsan

The Seven Cryptical Books of Hsan are ancient scrolls penned by Hsan the Greater over two thousand years ago. Each book has a different topic and contains discussions and instructions to execute spells and rituals related to that topic. You have successfully researched the Sixth Book, is on the multiverse and interplanar travel. When casting a spell relating to other planes, other worlds, or the multiverse, you make rolls with Advantage and can cast the spell using a spell slot one level lower than normal. You gain a +1 bonus to History, Insight, Nature, and Survival. You make any knowledge- or research-based skill check involving the multiverse, other planes, other worlds, and/or teleportation (or similar) with Advantage. Add 1 to all future Wisdom saves for the Seven Cryptical Books of Hsan.