The tournament is played in Standard format , which includes cards from 2020s Sword & Shield set through 2022s Pokmon GO (essentially all cards with D and E regulation marks in the bottom left corner)
If were going for price in US Dollar, the answer for Mountain is the same as every basic land: the Guru lands
And we see this in some of the most popular Mono Red commander options on EDHREC: Red is very good at Burn, and three of the top Burn commanders come with built-in resiliency to removal -- Ojer Axonil, Deepest Might, Solphim, Mayhem Dominus, Purphoros, God of the Forge -- which is especially good since Red has basically no good answers to board wipes
Automated Assembly LineAutomated Assembly Line took what Whirler VirtuosoWhirler Virtuoso started and built a whole kingdom out of it
Perhaps you have a Highlander deck that wants specific cards and cant find them
Its fairly straightforward in concept: you take a legendary creature with Choose a Background, and pair it with a Background