You do not need complicated combos or tricky setups just a board of Dragons and a clear attack step
There are also a few cards that dont quite fit into the archetypes of the preconstructed decks, Virtue and Valor and Fae Dominion
This might not be worth it in the early game, but by the late game youll have more mana than you know what to do with (unless youve got an Exsanguinate)
Not to mention whenever Robin, Champion of Sherwood is banished in a challenge, youll also get to draw a card off of him as well
It puts them on the battlefield if you have less than another player and they play a land
Etali, Primal Conqueror is a lot of stupid Dinosaur fun, and it's my Commander for Historic Brawl in Arena because it is just so satisfying to cast big spells for free (think the likes of Emrakul, the Promised End)