Thirst [Mirage] Bird Cleric it's a Spirit in addition

it's a Spirit in addition to its other types

steel and sinew

return another target Zombie creature card with mana value X from your graveyard to the battlefield

or does it portend something else

Set: Dragons of Tarkir Type: Artifact — Equipment Rarity: Uncommon Cost: {3} Gate Smasher can be attached only to a creature with toughness 4 or greater

Thirst [Mirage] Bird Cleric it's a Spirit in additionSet: Mirage Type: Enchantment Aura Rarity: Common Cost: {2}{U} Enchant creature When Thirst enters the battlefield, tap enchanted creature. Enchanted creature doesn't untap during its controller's untap step. At the beginning of your upkeep, sacrifice Thirst unless you pay {U}. The first of the Thousand Deaths.