When Hidetsugu and Kairi dies, exile the top card of your library
If you have just three, then four mana makes four 1/1s for everyone, and then one removal spell that kills them all will net 12 treasures for yourself, and you are ready to go
The damage prevention gives you options like Lightmine Field and Powerstone Minefield, plus just the defensive ability to Sevinne to block anything
Our environment tends to have lots of stuff with counters on them, so shutting down a popular line is a good idea, especially when its asymmetrical
You probably want to be able to make good use of the counters to make this worth it these days, but its a nice include in a deck where that matters
This feature provides a convenient way to obtain specific cards that enhance your overall synergy