That final ability is just gravy on top
Returning in this set are two powerful Constructed graveyard cards in Stitcher's Supplier and Priest of Fell Rites, both of which are returnable by Terra, but also help you progress your gameplan with incredible ease and efficiency
It also has an activated ability where you can pay one generic, one blue, and one red mana, and tap it to draw a card and discard a card
In Commander, where games are a lot slower, Krenkos ability really shines and can create a board thats almost impossible to deal with
Compare that to the location of Jafar, on the right hand card in the image above, as well as the fact that he is actually holding the Half Hexwell Crown
The key thing with Ureni is unlike Craterhoof, it prevents the crack back if you are unable to finish them off that turn