Ceithin-Har, Woe Dragon

Flying, trample
When Ceithin-Har, Woe Dragon enters the battlefield, if you control The Sisters of Twilight,
mount it to this creature.
Mounted creature gains trample and flying.
Mount {2} (Pay {2}, mount target creature you control
to Ceithin-Har, Woe Dragon. All damage dealt to
mounted creature is halved and transferred to this
creature.)