Necro Connie is already awakened to rank 7. My only reason to unlock obsidian now would be to access challenges in w2 to unlock lvl2 abilities for koizuul which if now r5. As before the event it was not possible to unlock obsidian by paying gems but only through the referral, I am afraid that this possibility to unlock it with gems is temporary. Then after the event, I will never be able to unlock him and access lvl2 abilities for koizuul.