Liliana, Death Mage Get rewarded when your creatures die, then bring them back to life so they can die all over again
Sapphire/Steel can also be highly effective by anyone who knows how to wield it, but the greater element of chance that its cards create is somewhat unavoidable
These dont contain the odds, so if youre looking for specific odds, please check out Mark Rosewaters article announcing Play Boosters
You'll be laughing if you can find a way to get multiple different activated and triggered abilities onto the stack, though
Lost to Phyrexia is a whopping 9/9 that lets you choose between three abilities when it enters the battlefield
Counter decks have had a ton of support over the years (including in Streets of New Capenna, where the precon was released alongside), and Bedecked Brokers has many of the best counter cards