Infinite spirits?

[Birdbrain]

{merilia, sylvok outcast} + {doomed travler} + {cauldron haze} + sac outlet

[fj76ts4]

{merilia, sylvok outcast} + {doomed travler} + {cauldron haze} + sac outlet

This doesn't work- when the traveler returns to the battlefield, it's considered a new instance of doomed traveler and has no relation to the previous one on the battlefield, meaning that it's no longer going to have persist when it returns.

[Sparkle Ninja]

{Melira's gatekeepers} + {Requiem Angel} + {Mikaeus the Unhallowed} + {Conspiracy} + sac outlet for infinite spirits