Shadowverse

In terms of mechanics, it somewhat resembles a cockroach, but it's much more cumbersome.

More like Seraph. Under certain conditions, on the eighth turn, you can bring out three Fungi, a Pendant (which is already on the board), and have Faith in your hand, dealing 21 damage to the hero, bypassing all defenses, which equals an automatic win. But not every battle goes perfectly, and yes, there are elements of "cockroaches," such as the Fyns and Goblin Mages.

Having two Faith cards in your hand is a blunder.

Well, why? It will be discarded along with everything else, so what's the difference?