With a board of expendable rats this is a bottomless draw engine
A Killer Among Us's last ability can target any attacking creature token, not just one of the tokens created by its first ability, and not just one of the chosen type
In mono-black, your options are a bit slim, but Crypt Rats can help both wipe the board and leave you with a bunch of Rat tokens if you have a lot of mana
Yes, you can use a ritual monster as a tribute to summon other monsters
P/T Number 221 Language English Legal Formats Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Timeless, Vintage Not Legal Formats Alchemy, Pauper, Standard Rulings (2/4/2023) A player with ten or more poison counters loses the game
19 Wigglytuff Ex Will Knock You Out With A Song Wigglytuff ex is good for some janky strategies but not a top contender