Some cards may be valuable simply because they are difficult to get
We also run powerful support cards to close out games like Chandra's Incinerator turning all ping damage into creature removal, Laelia, the Blade Reforged growing into an enormous threat with Ob's exile draw, turning Ob into a 1-shotter with Temur Battle Rage, and protecting him from removal with tons of cards like Armor of Shadows
While the previous incarnation of Craterhoof was a giant spiny reptile, on Tarkir it appears to be a giant green mammoth, with foliage growing from it like an elemental
His -7 ability will cause any number of target players, which could include yourself, to draw 20 cards
It makes you some energy and can be used for limited mana fixing
Or you can really ramp up your human token production with Horn of Gondor