With that in mind, Craterhoof Behemoth is a great choice, as you'll get an even bigger buff thanks to Volo when two of them enter at once
The Commander, Perrie, the Pulverizer, gives one of your creatures a huge upgrade when they attack and is supplemented with a pretty good suite of combat tricks
Its especially good in your deck if your mana curve is very cheap since you can use the free mode of the card without impacting your 5 or 6 mana cards
Okay, you still need to exile six cards from your graveyard and it can be very bad in multiples if you need to exile six more cards, but what if you got to manifest it, and flip it later for just 3 mana
If you put a permanent in during the end step that has an ability that triggers at the beginning of the end step, that ability will not trigger until the next turns end step