Orianna, The Time breaker

{w}{6}{t} Sacrifice Orianna The Time Breaker:
At the beginning of you upkeep choose
an amount of creatures your opponent controls
with converted mana cost 4 of less.
These creatures gain double-Strike and flying
and you take control of them.
You may pay an additional {w}{w}{w} to create
copies of these creatures except they are
1/1 white angel creature tokens and attack another
opponent. All creatures must attack this turn.
Exile them at the end of your endstep.