Grav Faz, famed

When you sacrifice a treasure token Roll a D20
1 : deal 2 damage to yourself and create no mana
2-9 : deal 1 damage to any creature
10-19 : Create an additional mana of the chosen type
20 : Exile Grav Faz, famed "engineer" and create an emblem that says
"Treasures you control have modular 1 and create an additional mana when sacrificed"