The denizens of Zendikar banding together to fight back against the Eldrazi is represented by the rally mechanic, with each creature boosting your team when you play it, and repeating that boost if you play more ally creatures
The reason I like Eruth is that it plays so well with cast from exile payoffs like Passionate Archaeologist and Memory Worm
The themes and mechanics of the deck are also a lot of fun to play with and mesh very well, with transforming cards, double-sided cards, token generation, graveyard nullification, card draw, and much more
Play all the things like Mark of Asylum which prevent noncombat damage to your team
Best Rare Cards to Proxy If you proxy in Commander, the first cards that come to mind are the original dual lands like Volcanic Island, Underground Sea, and Taiga
Are you going wide