Beclas said: I'm considering this a feature, not a bug. With Hazoret's Undying Fury, Pyromancer's Goggles and Karn's Temporal Sundering as the only other spell, you can easily get 10+ extra swaps each turn and changing this would make this combo impossible.So please, let Karn's Temporal Sundering be cast even in the future when the opponent has no creatures.
Szamsziel said: Wait. Temporal Sundering return creature (note: it's not opponent creature ). As so you may cast it to return your own to get additional advantage)(like extra swap is not enough advantage)