Trial // Error (#239)

[
  {
    "name": "Trial",
    "type": "front",
    "rules": [
      "Return all creatures blocking or blocked by target creature to their owner's hand."
    ],
    "types": [
      "Instant"
    ],
    "colors": [
      "W",
      "U"
    ],
    "subtypes": [],
    "mana_cost": "{W}{U}",
    "mana_value": 2,
    "supertypes": [],
    "color_identity": [
      "B",
      "U",
      "W"
    ]
  },
  {
    "name": "Error",
    "type": "back",
    "rules": [
      "Counter target multicolored spell."
    ],
    "types": [
      "Instant"
    ],
    "colors": [
      "U",
      "B"
    ],
    "subtypes": [],
    "mana_cost": "{U}{B}",
    "mana_value": 2,
    "supertypes": [],
    "color_identity": [
      "B",
      "U",
      "W"
    ]
  }
]