You dont need lands if you intend on swinging for lethal damage so you may as well take away everyones mana to reduce the chances that something goes wrong
This is done by taking 6 face-down cards from the top of your deck and placing them in the Prize card zone
Its not coincidental, I think, that he could do so in the vertically oriented 3.5:5 aspect ratio
You can find my other precon upgrades here: Blood Rites is a White / Black Vampire Aristocrats deck: the goal of the deck is to flood the board with vampires (Oathsworn Vampire), sacrifice them for value (Master of Dark Rites), and get even more value from sacrifice payoffs (Blood Artist)
Summary Brownbeard's card gains power in the right moment, a budget-friendly bruiser for attacks
Or maybe you want to give Oko, Thief of Crowns a taste of his own medicine when he tries to turn your commander into a 3/3 Elk