Tempting Contract

At the beginning of your upkeep, each opponent may create a Treasure token. For each opponent who does, you create a Treasure token.

Magic Online Promos

"Don't think of it as debt. Think of it as an investment in yourself."
—Diriga, demon bursar

Commander 2021

Each opponent in turn order decides whether or not to create a Treasure token. They will each know the decisions of players before them. Those Treasure tokens are all created at the same time. Then you create your Treasure tokens all at the same time.

Treasure

{T}, Sacrifice this token: Add one mana of any color.