The aptly-named Stunning Reversal replaces your game loss with a different effect, just like Lichs Mirror and Exquisite Archangel
Yet, it sees very little play
Plus, it gives you options
While there are other cards like Lingering Souls that create similar tokens but also provide additional value by being flashbackable, Shadow Summoning can still see play in the right context, especially in formats where instant-speed token generation is less critical
However, if a single creature with lifelink deals combat damage to multiple players or permanents at the same time (perhaps because it has trample or was blocked by more than one creature), the ability will trigger only once
The Floodborn cards Protective Embrace effect grants other characters the Ward keyword, making it valuable as a way of defending against challenges from your rival players