Is it just so used to mauling Trainers, or is its heart just really not in the attack anymore
The change of control happens before new targets are chosen, so any targeting restrictions such as "target opponent" or "target creature you control" are now made in reference to you, not the spell's original controller
If one of them resolves, it will remain in effect until the game ends, Tenth District Hero leaves the battlefield, or some subsequent effect changes its characteristics, whichever comes first
When it comes to these kinds of cards, getting it graded by BCA or Beckett is encouraged, but not a requirement
Echo proved to be unnecessarily confusing, so they moved to a version where you just paid immediately after you exchanged the creatures