Hostile Territory is very similar to Planetary Uprising, though this version is unique and importantly the damage doesn’t trigger until the start of the next round. Seizing Territory and Priority Target are the ways we have to take control of the battlefield besides claiming. Though, if you build a very specific deck you could also go with Landing Dock as a way to take control.

One of the most important things that will determine if Pyre can be good or not, will be the ability to give the battlefield to your opponent so that you can take control back and trigger Pyre’s ability again. The only card we currently have that can do that is Hasty Exit. If another card is printed with a similar ability, I can see Pyre being very good.

Another card that’s important to note is Pyre’s Blaster. We know that it will be in the set from a spoiler image, but haven’t seen the dice. The ability appears to say take control of the battlefield when you play it on Commander Pyre.