The abundance of creatures in Commander games means that Vanquish the Horde will often cost a paltry two-mana, most likely leaving its caster with plenty left over to take advantage of the empty, newly vanquished battlefield
This does create the question of how exactly the card came to be and why exactly the card designers would create a card that has the sole intention of forcing a draw, and also why one would play it
The first step is to ask the LLM to brainstorm 15 possible mechanics for the card
After being dealt damage, if they would die for any reason that turn, they'll be exiled instead
The funniest interaction I got in mind is playing it for 1 + 1 with Thalia, Guardian of Thraben on the board, and sweeping basically all the creatures from Human deck
I am definitely excited to see how these cards impact Commander and how my recommendations might influence your decks in particular