Agadeem's Awakening // Agadeem, the Undercrypt (#90)

[
  {
    "name": "Agadeem's Awakening",
    "type": "front",
    "rules": [
      "Return from your graveyard to the battlefield any number of target creature cards that each have a different mana value X or less."
    ],
    "types": [
      "Sorcery"
    ],
    "colors": [
      "B"
    ],
    "subtypes": [],
    "mana_cost": "{X}{B}{B}{B}",
    "mana_value": 3,
    "supertypes": [],
    "flavor_text": "\"Now is the death-hour, just before dawn. Wake, sleepers, and haunt the living!\"\n—Vivias, Witch Vessel",
    "color_identity": [
      "B"
    ]
  },
  {
    "name": "Agadeem, the Undercrypt",
    "type": "back",
    "rules": [
      "As this land enters, you may pay 3 life. If you don't, it enters tapped.",
      "{T}: Add {B}."
    ],
    "types": [
      "Land"
    ],
    "colors": [],
    "subtypes": [],
    "mana_value": 0,
    "supertypes": [],
    "flavor_text": "\"Here below the hedron fields, souls and secrets lie entombed.\"\n—Vivias, Witch Vessel",
    "color_identity": [
      "B"
    ]
  }
]