If I flip a cyber jar on my turn, and then lay down the monsters. Can I change of hearts the opponents monster and flip it that turn.

No...because the monster was just Special Summoned that turn...

You CANNOT manually change the Battle Position of a monster (yours or opponents) if...

A.) It was just summoned/Set that turn.

B.) Declared an attack that turn (regardless of whether or not it was negated)

C.) Has already had its Battle Position changed that turn

D.) An effect says otherwise.

You are incorrect.

You may target your opponent's monster with "Change of Heart" AND flip it that same turn.


You need to update yourself if you're going to just parrot rulings

In otherwords ...if YOU Summoned or Set the monster that turn YOU cannot "manually" change it's Battle Position...but your Opponent can.

I little harsh Simon no?

That is correct, assuming they can find a way to gain control of it (change of heart being forbidden, but then again so is Cyber Jar lol)

no