If that Army isn't already a Zombie, it becomes a Zombie in addition to its other types
You can only use 1 "Chaos Witch" effect per turn, and only once that turn, also you cannot Special Summon monsters from the Extra Deck, except LIGHT or DARK Synchro Monsters, the turn you activate either effect
(2024-07-26) Cards that would go to your opponent's graveyard for reasons other than dying, such as being discarded or milled, will still go to the graveyard and will not be exiled instead
Combine with Heartstone and Blasting Station and you have an insect powered machine gun
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
It's Pokmon Day, aka the anniversary of the day the first Pokmon game was released