The two best things about Cataclysm are that it wipes out most of the lands and all the planeswalkers and this does neither of those things
Its such a simple ability, but it absolutely ruins every day around
Sisu Empowering Sibling, for example, has the potential to totally decimate your opponents board if you are able to lower all of their characters strength
Cards like Vinelasher Kudzu were printed before landfall was conceptualized, but have since received errata to use the landfall ability word
It can be used for burn via CIP, but without delirium, it's unreliable for that purpose
For this reason, we run black-based recursion, either efficient like Reanimate or flexible like Obzedats Aid