The proliferation of these pesky creatures will almost always matter in a big way in Historic, Brawl, Commander, or any number of other formats, and Krenko will therefore almost always be a "kill-on-sight" sort of creature for that reason
I bet this finds its way into a ton of existing Izzet Commander decks
The devil Mahadi, Emporium Master looks for the same instances of creatures dying, and these cards are each 99% less expensive
Floodborn characters are more flexible and might be able to change their abilities during a game
Some booster boxes will have a higher density of more expensive cards from their release date, ensuring you can break even or profit from them by reselling the complete booster box, individual booster packs, or single cards