Activate Mischievous Quanar's first ability by paying ({3} magic symbol) ({U} magic symbol) ({U} magic symbol) , turning it face down.
Repeat from step 2.
If you control nine or more lands, this combo nets infinite Treasure tokens and mana, which you can then use to activate Mischievous Quanar to get infinite copies of any other instant and/or sorcery spell(s) on the stack.
Results
Infinite colored mana.
Infinite copies of any instants and/or sorceries on the stack.