Pokemon FireRed and LeafGreen buffed up the Gen 1 games by being a colored version of these games with Gen 3 elements and features
Seasoned Dungeoneer Seasoned Dungeoneer is excellent for taking back the initiative since protection from creatures includes unblockablility
Without access to Green, Boros can struggle to keep up with the amount of lands other decks are committing to the board
Every color has at least one good one and having a creature that's capable of fogging every turn, blowing up every Artifact or every Creature or in the case of Divining Witch, just being another way to win with Thoracle means people might not overextend into a threatened wipe, conceding you a bit of tempo advantage
You can psych your opponents out with Evercoat Ursine too, exiling cards that aren't very good to bait out a removal spell
18 Aegar, The Freezing Flame Burn Them Out And Draw Some More Aegar, The Freezing Flame is an untraditional burn commander, as its ability doesn't actually do any damage