Able to see/find opponent trap gems

[Plastic]

So today I noticed we’re able to find out which gems are the opponent’s trap gems that are meant to be used against us as players. The method is to tap any/all gems until you see it light up the card or PW it’s related to.

Here are 2 videos showing it:

Shadows of the Past

Kozilek, the Great Distortion

[Morphis]

Lol did not find out.
Usually I am pretty good at finding these cheat/cheap tactics

Good to know