At their core, Kaya, Spirits Justices most interesting party trick is resurrecting a giant creature from your graveyard
Teval's Judgment draws, makes a Treasure for ramping or makes a 2/2 on any turn, but just once/turn each one
In the context of a game played with creatures where card advantage and selection are game-defining, though, it was absurd, and was banned in Standard in 2017 and in Pioneer in 2019
Its not quite Play me now! good
I cant think of any of these that Wizards would want to take off the ban list, as theyre all problematic in their own way
OP01-051-eustasscaptainkid-701 is a defensive option that pairs well with the plethora of blockers in the deck, as opponents will have to target him instead of your leader