The example shown on the stream features a nice lore snippet, for example
You have to answer it quickly, otherwise itll keep attacking, gaining life, and making more 1/1 cats, and the City's Blessing is not that hard to achieve
Odds are they can't get mana, which means your lands are protected form being killed with spells by not letting them have any mana
This is a huge powerhouse for a lot of cards in the Simic colors
Naturally, these sorts of shenanigans are easiest to accomplish in a token deck, but any go-wide strategy can reasonably use Ezuris Predation to create an instant board, sweep away weaker opposing creatures, and move toward closing the game
Its got similar functions to the rest of the life counter apps, with the same options to track life, commander damage, infect damage, and total number of times a commanders been cast