When played, the opponent must reveal their hand and Ludwig's player can choose to discard any non-character card
Just look at the new Arabella, an unassuming uncommon from Duskmourn
Still though, in a Wizards typal deck, that should be pretty much all your creatures anyway, so that limitation shouldnt adversely affect the impact this uncommon Izzet legendary from the Dominaria set has on the game
Drawing two cards for two mana is a great rate, and the fail case is still a passible Telling Time, which means this card is rarely (if ever) bad
Youll run into: Tokens (usually standard size, but occasionally printed in other sizes depending on product) Emblems and checklist/helper cards (standard size) Oversized cards (promos, special products, Planechase planes, Archenemy schemes, Vanguard, and other delightful chaos)
Ghalta and Mavren is a great duo and an excellent addition to any token commander deck that shares its colors