Shroud is a protection that is a double-edge sword, but because this card gives it to all creature until you upkeep, youre using that other edge against your opponents
However, its mana value is high enough to blitz it out with Henzie, and you can sacrifice Bellowing Mauler to its own trigger before it would die to blitz anyway
You may put that card on the bottom.) Land Land (CTRL to add secondary) Protection Protection (CTRL to add secondary) Ramp Herald's Horn As this artifact enters, choose a creature type
Volo is all about anti-Tribal, meaning decks using him will really come alive when using creatures with weird and rare types
I contend that in Commander we are actually very used to playing with vanilla creatures, its just that when they come into play they also deal 5 damage divided as we please, or destroy all artifacts, or even tutor a card from our library
If you want some inspiration, you can read my article on how every Commander deck can use the graveyard