Blade of Selves Giving a creature myriad with Blade of Selves (itself one of the best myriad cards in the game), can be helpful in several ways
Hitting two permanents and bringing them back immediately also opens this blue instant up to some shenanigans, like targeting Archaeomancer and Gilded Lotus which allows you to re-cast it infinitely
* When one of the Champions of Kamigawa flip creatures flips, it becomes legendary
The official rules for emerge are as follows: 702.118
If you cast Fertile Footsteps, it goes on the stack as you'd expect a sorcery spell to, it can be countered or responded to as normal, and if it resolves you follow its instructions
D&D isn't technically a Universes Beyond property, but it is an outside-of-Magic domain that feels appropriate for one of these Standard release slots