Animate Graveyard
Enchantment — Aura
Enchanted graveyard is a creature on the battlefield with base power and toughness each equal to the number of cards in it. It has the text boxes of all creature cards in it. It's still a graveyard.
If enchanted graveyard would leave the battlefield, instead exile this Aura.
Rulings (10)
Similarly, if Animate Graveyard leaves the battlefield or becomes unattached from your graveyard, the animated graveyard will return to being just your graveyard.
2022-10-07
While you'll use the cards in your graveyard to determine the stats and abilities of your graveyard-that's-a-creature, those cards aren't themselves on the battlefield. For example, if you mill a card while your graveyard is animated, the milled card doesn't enter the battlefield. This isn't quite as wild as Yet Another Aether Vortex.
2022-10-07
Once enchanted, your graveyard behaves like any other creature. It can attack or block. You can enchant it with other Auras, equip it, use it to crew Vehicles, and so on. It won't naturally have any creature types—the text box doesn't include the type line.
2022-10-07
If the enchanted graveyard would leave the battlefield for any reason, instead Animate Graveyard is exiled. This will cause the graveyard to give up its dreams of being a creature and return to being only a graveyard. The graveyard doesn't die. It just goes back to being a graveyard. No abilities that trigger whenever a creature dies will trigger.
2022-10-07