portal 3 kingdoms booster box $500 Pack Opened It contains 180 cards depicting the events and characters of the Three Kingdoms story MTG - Portal Three Kingdoms

In theory, there could be decks that don't want Glasspool Mimic (ones that have almost no creatures), but even with just a handful of creatures worth copying in your deck, it's significantly better than the Island it will likely replace

Furthermore, it should also be possible to pull three chase cards in one pack (though we haven't seen this yet)

They pre-date 1st Edition, but contain shadowless cards

Notably, if you create a token that is a copy of a Powerstone token, the token copy won't enter the battlefield tapped

Tri-Brigade Ursarctic But wait, doesn't Ursarctic have a restriction that prevents Special Summoning monsters without a level