Ryomen Sukuna, King of Curses

Reach, Menace
When Ryomen Sukuna enters the battlefield, search your deck for the Shrine Cursed Technique. Attach it to Ryomen Sukuna. It can not be removed from Sukuna until he dies.
At the beginning of your turn, add 4 Cursed Enery counters to Ryomen Sukuna
Ryomen Sukuna cannot take damage while blocking.
When Ryomen Sukuna dies, search your deck for Sukuna's Fingers, reveal it, and then add it to your hand.