Thankfully, we have ways to cheat on the cost, with Runaway Steam-Kin making our one-mana cantrips free as long as we can get it up to three counters and Dreadhorde Arcanist allowing us to flash back a cheap spell to further grow our Kiln Fiend
Not only is the art and whimsy on point, but Wizards even put in extra effort to make it especially special
With the handful of demons in this deck, he can potentially draw you a few cards when he enters the battlefield using his Prince of Chaos ability and he can leverage his status as the Lord of Torment in order to have your other demons dole out big damage when they enter the battlefield
If deck-building allows it, try to put a companion in there too
Bloodthirsty Conqueror Bloodthirsty Conqueror is among my most hated cards from Foundations , mainly because it's an incredibly unfair finisher
Red-Green Landfall Aggro Transform your lands into tide-turning territory with red-green aggro cards