He can't be blocked this turn
We've seen in the past how this card can be a major deciding factor in games if left unchecked, and, if the current top end decks take a dive, Wandering Emperor could rise up to take over
Other cards that have indestructible counters, like the Dominus or Myogins, for instance, are pretty mana-intensive, and even Tyrite Sanctum (incidentally, a pretty darn good utility land for the Tidus deck) asks you to jump through some hoops
Great on its own, or perfect in Vaevictis Asmadi, the Dire
If need be, sideboard in extra answers for that card type, such as artifact destruction
Id advise you to check with your playgroup during your Rule 0 conversation before pulling out any deck that runs something like Scrambleverse, or even Warp World