most powerful black mtg cards Still Devoted To Mono How to Build with Black

Lets make a rough sketch of our deck: A deck that can take advantage of the graveyard

Then you draw a card when it ETbs, so even if answered immediately, you'll not be down a card

Without an established agreement, some overzealous player is going to get carried away and buy more cards than everyone else and always win

Also, in general, both one off mass sacrifice effects and those limited to once per turn are overly restrictive

The tithe effect is no [casthaven]Gray Merchant of Asphodel[/casthaven] or [casthaven]Exsanguinate[/casthaven] (though I bet you run both those cards in the deck proper), but that actually works to your benefit