Call for Unity has the new Revolt ability word, which activates whenever a permanent you controlled left the battlefield this turn
From here, we see a drop-off in value, but not nearly as steep as the one in Game Over
If you do the math, youll notice that this card doesnt increase your hand size if you play [c]Thrill of Possibility[/c] and discard a card, your hand size decreases by two, and then you draw two cards to replace them
Postboard, you can be more aggressive as they need to make their deck relatively vulnerable to that in order to not just die to Excruciator, and you want to threaten them from multiple angles to put them in difficult positions
It does not even need to be your own stuff dying, just that two things died before your turns end step