If you're playing a dedicated artifact deck, being able to make extra bodies is great, and if you're playing a dedicated Dinosaur deck, you can get a ton of Treasure tokens to ramp into your high-mana Dinosaurs
This means that, after initially being cast, Kroxa's controller will never be required to pay Commander Tax, as Kroxa can merely be cast from the graveyard.
Sisay, Weatherlight Captain is the legend of all legends, and her ability to search the deck for Legendary cards and put them into play makes her the perfect Commander for this deck full of them - including all the Shrine cards: Hondens, Sanctums, and Go-Shintai's, which allow the deck to incrementally grow into an enormously powerful machine generating massive value each turn
So, I'm gonna put that up there
The Spike Considering how little attention Green Goblin garnered in Commander leading up to Marvel Super Heroes, it used to be quite cheap