Yurlok has a very silly way to damage all your opponents this way by tapping to give three mana, one black, red, and a green mana, to all players
We have previously seen it in only collector boosters (planeswalkers in collector's boosters for Bloomburrow ), multiple types in each play/draft booster ( Wilds of Eldraine , and March of the Machine ) as examples, and more
Synergizing with goblin go-wide Aggro builds, rolling a one to nine creates a 1/1 Goblin and a 10 to 20 creates a 1/1 token with Goblin Morningstar attached to it
This is just an ordinary creature (although it is a Phyrexian Shark, which rocks) but it has Flying, and its secondary ability is very useful
But if you truly want to slow the game down to an absolute halt, add the following Humans: Grand Arbiter Augustin IV and Thalia, Guardian of Thraben