You lose a creature or two, now you are up by all those nontokens sacrificed
Its easy to set up delirium in decks that want to, and you can have a win condition based on the number of spiders you have, making Iskkanah a solid delirium commander
Evaluate your pods usual mana base during games before including Blood Moon in one of your red decks as it might not even be worth it if your opponents usually run more basic lands than nonbasics
Bringer of the Blue Dawn, for example, was recently discovered to be one of the previously added Momir cards thanks to a recent Reddit post
Dinosaurs are great, but since they support each other, they tend to thrive when the deck is full of great dinosaurs
Umori, the Collector Choosing creature with Umori, the Collector makes all of your rats cheaper to cast, making it a natural commander for Rat Colony