One of the great things about Evereth is that shes pretty powerful even when you arent comboing off, but your deck is also likely to be packing a few ways to win the game with an infinite sacrifice loop like this one
Exquisite Blood You rarely see Exquisite Blood without Sanguine Bond for the insta-kill combo, but its perfectly respectable on its own
They can surprise an opponent for that last point of damage that you need for the win or help facilitate decks that like to see creatures enter the battlefield to trigger other effects
Have this double trouble pair incite shenanigans on your play pod by paying the three mana to activate Brash Taunter to fight Donna Noble
For example, if this creature is in play, you should be trying to empty your hand as fast as possible so that you can take advantage of his ability
Hearthhull, the Worldseed Hearthhull, the Worldseed looks incredible to me