Eileen The Crow

Vigilance, Haste

As long as Eileen is untapped, she has Hexproof and can’t be the target of abilities or attacks. If Eileen is not at her maximum life total, she gains Deathtouch. Whenever Eileen becomes equipped, instead of gaining toughness, she gains that much power instead.

{t}, Pay 2 life: Eileen gains Flying until end of turn.
If she attacks, she loses Vigilance this turn.