Hoarding Ogre (Adventures in the Forgotten Realms)

Creature Ñ Ogre - Whenever this creature attacks, roll a d20.
1Ñ9 | Create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")
10Ñ19 | Create two Treasure tokens.
20 | Create three Treasure tokens.