I am putting them both here at #10 as they are simultaneously very similar and very dissimilar
these are triggered abilities that occur in the middle of a paragraph, usually after some kind of action or choice
In a high-powered Commander game, Ancient Tomb is brilliant - accelerating you towards your win condition and putting you a land up on your opponents for a fairly inconsequential cost
Characters like Gramma Tala Storyteller and Mickey Mouse Detective net you some extra Ink early on so you can drop big hitters like Maui Demigod and Simba Fighting Prince
Now, even a single, early instance of poison represents a fast, unpredictable and almost uncounterable clock on your life
For decks with mechanics that interact with your graveyard in any way, this feels like a huge boon, especially because it gives you the ability to pick and choose what goes there