Talk:Boy Transformation, Yamigitsune/@comment-27174169-20160117021002/@comment-27697921-20160117033807

For cards with abilities that say "This ability can only be used once per turn" it all comes down to whether or not their ability is in quotes, as "Sense Synchronization" is, it can only activate once per turn no matter how many copies of the card you have.

As Tagion said, only one Ziun could be on the field, so it wouldn't work anyway, but do note it is valid for multiple copies of other cards.

From Bushiroad: "If the card instead states "This ability can only be used once per turn", such as Electron Ninja, Shiden's ability, then you can use each Electron Ninja, Shiden's ability once." So, if you had 3 Shiden's on your field, you could use each of their abilities once, for a total of 3 in that turn.

It may sound weird, but it's all in the whether the ability is written in quotes with this type of language about abilities that say they can only be used once per turn. So, your tactic will work, just not with cards like Boy Transformation, Yamigitsune.