semiautomagic asked: From a Vorthos perspective, what makes some Zendikari Allies and some not-Allies?

To me it’s about whether you are (at any point) an active participant in the united Zendikari army at Sea Gate, which falls (eventually) under the command of Gideon Jura. Other Zendikari may fight for their survival against the Eldrazi, but not as part of that single unified force.

