For Critical Hit, you can return the card from your graveyard to your hand whenever you roll a natural 20
In a game where a player can't act during their opponent's turn, this means that if Unown's opponent goes second, they only have one turn to play before they lose
Ive since seen several grinders and pro players throw around similar mono-grey lists online
Part of the reason is just the sheer amount of excellent art in the set, which the publisher says contains the largest collection of Final Fantasy artwork ever in a single game. But another big reason are the goofs, which are deeply embedded into the mechanics of the popular trading card game
This is supported by Ari Nieh, a designer and White's representative in the Council of Colors, who had this to say about Mangara: Mangara, the Diplomat signals the beginning of WOTC warming up to White getting some forms of good card draw, and I for one am extremely excited for it
Toshiro Umezawa is a great example of a Hexblade Warlock