mtg reading the card explains the card Playmat I believe someone once said,

In Judge Tower, however, it becomes a very silly way to call a rule error on someone

That is a lot of ifs and so this is a bit of a mixed bag

As long as players are using opaque sleeves, such that no one can identify these cards out of a stack of normal cards, does it really matter

While paying five mana and going down a land can seem like a steep cost for targeted removal, shuffling a creature into its owners library will usually put it out of reach without the help of heavy card draw or tutors

Im still eager for people to try the print-and-play version of Otters

Including sacrifice mechanics is also a good way to make Saurons steal effect more potent