Good ETB effects are rampant in EDH so those activated abilities make this a good skill testing commander, because Livio is much more dangerous in the hands of an experienced player than in a newcomer
This can disrupt highly strategic opponents by making it nearly impossible to plan ahead
Lead MTG designer Mark Rosewater says in a 2023 blog post that Cascade is "easier to manipulate through deck-building, which is a downside from a play design sense, but an upside from a power level sense", compared to Discover
Knowing the exact pokemon card dimensions matters when choosing sleeves, top loaders, and binders, because even a fraction of a millimeter of slack creates movement that causes edge whitening over time
If an opponent can identify where it is after you sneak it onto the battlefield, they can activate the ability to return it to your hand