portal 3 kingdoms booster box $500 Pack Opened and 2 land. MTG / Portal 3k

While you can search for only 10 cards at a time, the Apathy House Trade Evaluator is a nice way to find reasonable prices

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

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

If youre using a Commander who likes exiling things like either incarnation of The Mimeoplasm, Torrent Elemental is going to be a really good card for you