If the opponent doesnt have hate, its quite likely youll find another relevant target a mana dork, Ragavan, opponents engine cards, etc
Point your camera at any Magic: The Gathering card and get an instant ID, current market price, and recent sales data
It perpetually gains "this creature can't block." (Perpetual effects that are given to cards are permanent regardless of what zone those cards are in and what zone they move to.) When this card specializes from any zone, you may sacrifice a creature
Now, some cards may not feel like a fit due to the nature of their abilities, but as more come out, more will be able to slot into preexisting decks
With that in mind, Zedruu remains my commander of choice