Mox Opal [Kaladesh Inventions] Core Set 2019 Tokens if your opponent controls more

if your opponent controls more cards than you do: You can make your opponent banish cards from their field face-down so they control the same number of cards as you do

If both players chose cards with equal Level Stars

You can only use each of the following effects of "Unchained Soul of Disaster" once per turn

You can only use this effect of “Vorticular Drumgon” once per turn

Negate the attack

Mox Opal [Kaladesh Inventions] Core Set 2019 Tokens if your opponent controls moreSet: Kaladesh Inventions Type: Legendary Artifact Rarity: Mythic Cost: {0} Metalcraft {T}: Add one mana of any color. Activate only if you control three or more artifacts. On loan from a private collection, this unique mechanism extracts power from a carefully prepared gemstone.