7 Gornog, The Red Reaper Cut: Loyal Apprentice If youre feeling like leaning into the Warrior kindred approach to your Mardu Surge upgrades, you can always get yourself a copy of Gornog, the Red Reaper
This big beast costs 8 mana in total and is a 5/5 with haste, but it also has a powerful ability: "When this creature enters, creatures you control gain trample and get +X/+X until end of turn, where X is the number of creatures you control." If a player has a board of around 10 creatures, and they slam down a Craterhoof, they're likely to take out multiple opponents in one turn
Hakbal of the Surging Soul Making all your creatures explore offers a ton of card advantage
This means Frodo will often get to do his job pretty well at least into the mid-game, where your combo kill plan can take over
But for the most part, if you dont want to put a bunch of goblins in the red zone, Boros is a bore