Sacrificing Spawns is what you do in an Eldrazi deck, and Writhing Chrysalis is more than willing to benefit from the corpses you leave along the way
It's a real sight to behold
Persist is a very sweet ability thats often looked down on because design teams avoid mixing mechanics that use +1/+1 and -1/-1 counters to minimize confusion, and mechanics that feature +1/+1 counters tend to be very popular
It turns out that it's the land you want to find
While Imps Mischief is in some ways better, because it gives a Deflecting Swat effect to Black, its also nearly $30, and not worth it unless youre playing at the highest power levels in which case youre probably playing red and/or blue anyways, defeating the purpose
Overall, however, Id say its still on the easier side of things and might not appeal to hardcore TCG players