Mardu gives us an embarrassment of great options, all of which play very differently but which work well with the package
The image reimagines the city as a single Mountain, outstretched on a dark background, the reds and yellows contrasting starkly with an inky void
Your biggest rival will be Cogsworth, Grandfather Clock from Rise of the Floodborn, as his ability to give all other opposing characters +1 Resist will completely turn off your Sheriff as his reduced damage wont get through the Resist and Cogsworths Ward ability means you cant target him either
It also has the useful attack Chaos Wheel, which for the cost of 1DCE, 1-grass, and 1-psychic, deals a damage of 100, while also locking the opponent from using any Stadium, Tool, or Special Energy card during their next turn.
Aside from buffing up your dragons, you also have ways to give them trample with cards like Garruk's Uprising which help punch through the decks that are heavy on fliers in Starter Commander