I assumed Ariel would be the chase card of Ursulas Return even before the set came out
Unlike Self-Destruct Button, the card is perfectly legal in competitive play, so you're more than welcome to try to go to a competitive event and force draws if you really want to.
On the other hand Cryptic Command is in one colour and has a far far broader range on its abilities allowing you to be completely safe in almost any situation
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It's by no means the best upgrade for creature reanimation (we'll get to that), but it's a cheap, repeatable effect that can keep your forces replenished with ease