Mox Opal [Kaladesh Inventions] Elf Warrior Set: Limited Edition Alpha Type:

Set: Limited Edition Alpha Type: Enchantment — Aura Rarity: Uncommon Cost: {2}{U} Enchant enchantment

but now that he is one of them

Set: Portal Three Kingdoms Type: Legendary Creature — Human Advisor Rarity: Rare Cost: {1}{U}{U} {T}: Return Lady Sun and another target creature to their owners' hands

Set: Champs and States Type: Creature — Elemental Rarity: Rare Cost: {G}{G}{G} Trample

one must assassinate the previous king

Mox Opal [Kaladesh Inventions] Elf Warrior Set: Limited Edition Alpha Type:Set: Kaladesh Inventions Type: Legendary Artifact Rarity: Mythic Cost: {0} Metalcraft {T}: Add one mana of any color. Activate this ability only if you control three or more artifacts. On loan from a private collection, this unique mechanism extracts power from a carefully prepared gemstone.