Then, and this is the main thing, Whenever Kroxa enters the battlefield or attacks, each opponent discards a card, then each opponent who didnt discard a nonland card this way loses 3 life. Kroxa is a bit odd, but theyre an all-rounder for discard decks
Spending rare wildcards on things like Brainstorm, Mana Tithe, and Faithless Looting is the price you have to pay if you want to play Historic on a competitive level
These are typically going to be the best uncommons that really drive you towards playing a particular color, like build-arounds and good removal
Playing one card, named Cleanse, causes all black creatures in play to be destroyed. Another, called Crusade, provides gains to all white creatures. The racist imagery of the Invoke Prejudice card is especially obvious