Ça a même été confirmé :
"Before I wrap up for today, I do want to touch upon one last element of party. As I said above, the last two times we visited Zendikar, we captured the adventure party feel using Allies. As such, during vision design, we made sure that every Cleric, Rogue, Warrior, and Wizard was also an Ally. This was done so that Zendikar Rising would play nicely with your old Ally decks. The problem was Ally is a class type. Because of party, the creatures also had to have another class type. In addition, the classes needed a race. This proved to be pretty wordy, especially on legendary creatures, some of which the text wouldn't fit. Ally, itself, doesn't have much mechanical meaning in Zendikar Rising (there is one card that cares), so we were adding a lot of words for something that barely mattered in the set it was in. Sadly, that meant that we had to pull the Ally creature type, so Zendikar Rising doesn't have any Allies."
Tazri est la seule carte qui mentionne les alliés.
https://magic.wizards.com/en/articles/archive/making-magic/zendikar-rising-challenge-2020-09-01