Wrath of Galadriel

(You may cast a legendary instant only if you control
a legendary creature or planeswalker.)
Target creature gets +5/+3 and gains menace,
trample and double strike until end of your
next turn. Take an extra turn after this one.
"You have no power here, servant of Morgoth!
You are nameless, faceless, formless. Go back to the
void from whence you came!"