Rayami's Specter

Flying
Whenever Rayami's Spectre enters the battlefield or attacks, target opponent reveals their hand and you choose a creature card from it. Exile that card with a blood counter on it.
As long as an exiled creature card with a blood counter on it has delve, Rayami's Specter has delve. The same is true for flanking, ninjitsu, convoke, dredge, infect, undying, persist, cascade, evolve, extort, dethrone, prowess, and