Zack Fair is worse than Dauntless Bodyguard and Selfless Savior in a vacuum if your list doesn't care about Legends, but the ability to transfer equipment makes it a decent support for future Hammer Time decks, though it will likely compete for slots with Skrelv, Defector Mite
Then it calls for the big, bad Eldrazi token to add some extra punch
The +1 lets you examine the top two of your library and then exile one and draw the other
Tokens, +1/+1 counters, planeswalkers, and even infect all benefit from a single five-mana enchantment
A great way is turning the worst-case into the best case, by way of Electro, Assaulting Battery or Birgi, God of Storytelling Horn of Bounty
This results in infinite landfall triggers, which of course also results in infinite Ally tokens