In a 1v1 match it might be more balanced like the Tui and La depict, but at a 4-player commander table, it's usually quite worth it for you to pay the cumulative upkeep for a couple of turns
The Green dorks will exile something from your graveyard and then let you cast it
Sephiroth, Fabled SOLDIER / Sephiroth, One-Winged Angel Sephiroth, Fabled SOLDIER is a perfect card
Both of these are ok when playing on a budget
2 Minas Morgul, Dark Fortress Fill It With Your Enemies A utility land to start pushing damage through, Minas Morgul, Dark Fortress brings back a rarely used mechanic, shadow, with a new twist
Westvale Abbey is a land that allows you to pay life to Create tokens, but also sacrifice five Creatures to transform it and untap it, at which point it becomes a truly terrifying Demon