Orochimaru, The Immortal

Evolve (Snakes shed their skin)

Whenever one or more +1/+1 counters are put
on Orochimaru, investigate that many times.

Whenever you sacrifice a Clue, put a +1/+1
counter on another target creature you control.

"Why are humans such fragile creatures?"
—Orochimaru, Konoha's White Serpent