It's important to remember that stax and hate cards aren't appropriate for all tables and that not all forms of proactive prevention are created equal
Overall, I have to say that Im pretty disappointed in this iteration of Athreos
Legendary Planeswalker - Liliana Tevesh Szat, Doom of Fools +2: Create two 0/1 black Thrull creature tokens
Anytime an opponent casts a spell with mana value equal to the number you pick, or they cast a creature with either power or toughness equal to the number you picked, that player loses two life and you get to draw a card
Against fair decks, its really going to depend on how theyre trying to interact and how theyre trying to win the game
You have Commanders like Marchesa, the Black Rose that capitalize on how +1/+1 counters can be placed on creatures to keep them coming back, and Inalla, Archmage Ritualist that similarly lets you cheat a bit with making extra Wizards even when Inalla isnt in play