A notable collaboration is that of the Pokemon TCG with the artist collective "3D-DCG" (Three-Dimensional Digital Computer Graphics)
For example, its 100% okay if you and your opponent both control your own copies of Thalia, Heretic Cathar
Basically, no matter what your opponents choose to do, Rhystic Study will be super annoying for them to play around, and whats annoying for your opponents is great for you
Note that most of the time, this is irrelevant - you're going to use them for Extra Deck plays anyway
Could be a good inclusion if youre upgrading the Dance of the Elements precon
Flooding your opponents hand with land cards beats the hell out of just drawing them cards, and youll always get to see what nonland theyre about to draw