Its biggest downside is only drawing one card instead of two, so there are definitely situations where youd rather have Hedron Archive instead, especially in the late game
Regardless, here are some popular archetypes for your own inspiration
These types of cards reimagine characters in a totally new light, sometimes at odds with their original design or personality
Its nice to see a new card type strike a good balance between providing room for innovation without being too powerful or too weak
That said, the mirror is super messed up
It also nullifies your opponent's graveyard - pretty backbreaking for strategies like 'Dredge' that rely on the 'yard - and allows you to grab your opponent's best threat from the void and play it free of charge (Okay, at the cost of its own life, but it's a lowly two-drop, so who cares?) Paired with targeted discard cards like the popular Thoughtseize, Dauthi Voidwalker has the potential to be super scary