Rin Yamaoka, the Spirit

Flying, deathtouch
Phasing (This phases in or out before you untap during each of your untap steps. While it's phased out, it's treated as though it doesn't exist.)
Yamaoka's Haunting {5}{b}: Activate only while Rin Yamaoka, the Spirit is phased in. It phases out until the start of combat on your next turn. During combat on that turn, this card can't be blocked.

She inherited incredible fury from her ancestors. The wrath that flows through her veins is her legacy. The terrible pain