If you like the idea of playing fun sacrifice decks without going infinite or if youre a fan of the sacrifice decks in Standard or Historic then Shirei will certainly take care of you
In these styles of decks, you are often accruing plenty of life so losing life from Sorins first ability is a non-issue
The only thing stopping dedicated land ramp decks is running out of gas, but with Tatyova constantly keeping your hand stocked up things can spiral out of control in a hurry
That said, these arent generally questions the table needs to concern themselves with
This can apply to 1 or 2 of the corners, and in rarer cases, all of the corners
(They can't be blocked, targeted, or dealt damage by Rats.) At the beginning of your end step, target opponent creates a 1/1 black Rat creature token with deathtouch