You could look to this team up to cheat in massive legends, like Drakuseth, Maw of Flames, or keep things lean, focusing on cheap legends like Thalia, Guardian of Thraben that help you curve out and get haste quickly
The Strategy This deck is a midrange deck that aims to establish an engine of token producing along with your commander and drawing cards
There are a ton of PKs out there that will tend to kill in a single hit, like Blightsteel Colossus or a Commander with 21 or more power in that format
Notable hits here are the $70 The Ur-Dragon, $15 Scalelord Reckoner (funnily enough, I and a fellow Dragon enthusiast almost cut this from initial builds), the $15 Utvara Hellkite, and the $10 Kindred Discovery (which seems to have begun bouncing back from its recent reprint)
From Fountain Djinn to Haughty Djinn theres all sorts of interesting stuff for Djinn decks in Dominaria United
For what