If you just want a clean, straightforward one-turn kill, Chandra's Ignition is a pretty good option, able to smite every creature and player in such dramatic fashion that they probably won't really mind
Mastering the graveyard can yield some incredibly potent effects, so long as you play your cards right
You also have Flowerfoot Swordmaster and Valley Questcaller as additional lord effects, Might of the Meek to push through damage, and potentially Dewdrop Cure to recur your team
I mention Cadric, Soul Kindler here since it works in a similar space
Wheel of Fortune ($378) Wheel of Fortune is a great game show and among a category of cards that in many a red player's case, net seven fresh cards with minimal losses
Looking for the MTG Commander banlist