You wont always need to rely on Singularity Rupture
Avons best Island is perhaps the games best: a beautiful, twisting crag, massing behind the flock of birds, stretching up over the midground waves, vanishing into the white above and the blue below
Of course, a dedicated Etrata deck will usually have even better ways to cheat this downside: phasing or flickering her out of play before the shuffle, attacking with copies of the original or copying the trigger itself, or even destroying the target with some other assassin in response to fizzle the shuffle
I tend to play the slower power levels our format offers, both on our own platform and in my local game store, and while good tutors arent banned in those environments, you will hear the table collectively groan or mumble when a best in slot tutor gets cast
Fleeting Memories: interesting
Flashing this in on someones end step is actually a really satisfying reflection of how this mechanic would work in a pinch, and you know I love when flavor meets function