Maxperson
Morkus from Orkus
The real question is, what happens if you Thunder Step(or other teleport) into an anti-magic area? The reappearance is magical, so would be blocked. The disappearance wasn't in an anti-magic zone, so it goes off without a hitch.As I said, I've provided an interpretation, but as usual with the 5e rules, there is no absolute certainty and it's up to the DM to provide his own ruling. What I objected to was @commandercrud trying to imply that there was only one when it's clearly not the case.
After that, in terms of coolness factor, I can see merit in both interpretations, they can both look cool, and honestly it's not like that spell is overpowered in itself, it's nice, and a bit of flexibility rarely hurt anyone. What I think is important is the potentiality to harm others in the party of the caster, actually.
Does the spell fail completely? Would you have the caster appear in the anti-magic zone? Would you have him disappear and only re-appear once the zone is gone(if it ever goes away)? Or is the caster thrown into some other plane?