Most of the creatures are must-kill, so its not like the board just fills up all the time
High power and versatility with mild theme perks is what you get with Ally of Zendikar
You had Commander decks - which could, theoretically, be introduced into Historic without completely breaking things open - that were never added
A fun detail of this card is that changing creatures into cowards removes all other creature types, letting you wreck your opponents' tribal strategies even while you deploy your own
Not only are you just burying your opponents in legendary spells already, but theyre all just getting a static +5/+5 or more most of the time, too
Because of this specific wording, these creatures dont partner with a card that just has partner, like Sakashima of a Thousand Faces