Luna, The friendly Dragon

Defender, Flying, Shroud
{2},{u/r}, Choose target permanent. That
permanent's controller chooses target
permanent you control. Exchange control
of those permanents.
Tap a permanent you control but don't own:
Draw a card.
Return a permanent you control but don't own,
Copy target Instant or sorcery.
Luna Cost's {x} less where {x} is the number of
permanents you controller but don't own.