@pukunui81Shouldn’t a lich’s Wis save bonus be +10 (+3 Wis, +7 PB)? Also, shouldn’t its Arcana be +19 (+5 Int, +7 PB x 2)? The lich's Wis. mod. is +2. And yes, its Arcana bonus is unusual.

— Jeremy Crawford (@JeremyECrawford) September 9, 2016

@pukunui81Huh. For some reason my brain was certain its Wis mod was +3. Thanks for clarifying that. No problem!

— Jeremy Crawford (@JeremyECrawford) September 9, 2016