When a permanent is sacrificed it is moved into its owners graveyard
There are a bunch of Commander Classics like Hornet Queen, Nantuko Vigilante, Caustic Caterpillar, future strong cards like Haywire Mite, multiplayer classics like flying regenerator Fog of Gnats and the card drawing and recurring Grave-Shell Scarab, token making Ant Queen, game winning rampers like Moldgraf Monstrosity, Giant Adephage and Living Hive
In for the Mill The history of milling actually starts before Millstone was printed
Reprints Source Material cards were divisive in Avatar: The Last Airbender , but those are back, too, with original art from the likes of Alex Ross, Frank Miller, and Jack Kirby
And instant speed too, by the way, so you can drop stuff in response to people attacking if you need defense, or at the end of someones turn, right before you untap and attack with them
At the beginning of the next end step, return that card to the battlefield under its owner's control