Primal Amulet // Primal Wellspring (#243)

[
  {
    "name": "Primal Amulet",
    "type": "front",
    "rules": [
      "Instant and sorcery spells you cast cost {1} less to cast.",
      "Whenever you cast an instant or sorcery spell, put a charge counter on this artifact. Then if there are four or more charge counters on it, you may remove those counters and transform it."
    ],
    "types": [
      "Artifact"
    ],
    "colors": [],
    "subtypes": [],
    "mana_cost": "{4}",
    "mana_value": 4,
    "supertypes": [],
    "color_identity": []
  },
  {
    "name": "Primal Wellspring",
    "type": "back",
    "rules": [
      "(Transforms from Primal Amulet.)",
      "{T}: Add one mana of any color. When that mana is spent to cast an instant or sorcery spell, copy that spell and you may choose new targets for the copy."
    ],
    "types": [
      "Land"
    ],
    "colors": [],
    "subtypes": [],
    "mana_value": 0,
    "supertypes": [],
    "color_identity": []
  }
]