Rayalda, Peace Personified

Lifelink, Defender
Convoke (Your creatures can help cast this spell.
Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
When Rayalda, Peace Personified dies, create ten colorless Treasure artifact tokens with "{t},
Sacrifice this artifact: Add one mana of any color
to your mana pool."