Darkstar Doppelgänger

Ward: {w}, {u}, {b}, or {g}.
Deward: {2} (An opponent may pay the Deward cost
to perpetually remove Ward from this creature.)
Diligence (When this creature attacks, untap
each other attacking creature you control.)
Astral (This creature can't be blocked except
by creatures astral and it may block creatures
with flying.)