Essence of skill mastery, essence of the teacher, essence of purgatory in my opinion would be interesting, he or she could master lots of skills teach a people when they are bored and train in the perfect dimension
Ch 186 General Question For The Readers # 2
Finding Purpose In The Multiverse: Meta Essence Quest Mode
Essence of the teacher, maybe he could impart some of his knowledge to others like red hood or zatanna or essence of the stando powaha to give his loved ones stands it would be interesting
Ch 167 General Question For The Readers
Finding Purpose In The Multiverse: Meta Essence Quest Mode
It would be interesting if he got cypher's powers especially when he found howard stark interesting enough to research things related to him (like science,technology,language)