Unless that creature leaves combat, it continues to be an attacking creature through the end of combat step, even if the player it was attacking has left the game or the planeswalker it was attacking has left combat
What is so special about it
I love that they color shifted this from Blue and Red to White on a legendary dork you can build around
I'm thinking of cards like Ranar the Ever-WatchfulRanar the Ever-Watchful, which does love blink effects but also plays into a Spirits theme, and Isperia, Supreme JudgeIsperia, Supreme Judge, which comes in a fliers-themed preconstructed deck whose ability also gives you time to build up blink shenanigans
Unlike the initial Pod, I don't have to spend any mana (or life) to use it, but I do have to wait a turn, which is why it's here instead higher on my