A statement posted to social media over the weekend stopped short of apologising to unhappy players, but did admit some of the new feature's restrictions were actively "preventing players from being able to casually enjoy" the card game
Before it, you needed a weird four-card Expanded combo (Eternatus VMAX, Weavile-GX, Darkrai-GX and Kecleon CRE) to achieve this result
In this case, that damage reduces your life total as normal.
This mechanic revolves around generating random numbers to get certain benefits, which is interesting in a video game because you can easily generate random numbers and track those effects
For starters, you have the above Chernabogs Followers
You check if a card is touched as the spell/ability resolves, not while the flip is in progress