What type of card is My Wealth Will Bury You?

Q: What type of card is My Wealth Will Bury You?

My Wealth Will Bury You is a Scheme. Its oracle text reads: "When you set this scheme in motion, create a number of Treasure tokens equal to the number of artifacts and enchantments your opponents control. If they control fewer than four artifacts and enchantments, create four Treasure tokens instead. (Treasure tokens are artifacts with "{T}, Sacrifice this token: Add one mana of any color.")"

My Wealth Will Bury You

Scheme

When you set this scheme in motion, create a number of Treasure tokens equal to the number of artifacts and enchantments your opponents control. If they control fewer than four artifacts and enchantments, create four Treasure tokens instead. (Treasure tokens are artifacts with ", Sacrifice this token: Add one mana of any color.")