Activate Emiel the Blessed by paying ({3} magic symbol) , blinking Charming Scoundrel.
When Charming Scoundrel enters the battlefield, it triggers twice, and Preston triggers twice if it has power 2 or less, or once otherwise.
Resolve the Charming Scoundrel triggers, creating two Treasure tokens.
Resolve the first Preston trigger, creating a token copy of Charming Scoundrel that is a 0/1 Illusion.
When the Charming Scoundrel token enters the battlefield, it triggers twice, creating two Treasure tokens.
Repeat from step 4 for the remaining Preston trigger, if applicable.
Activate three Treasures by tapping and sacrificing them, adding ({3} magic symbol) .
Repeat.
Notes
You may instead create Wicked Role tokens and/or rummage using Charming Scoundrel's triggers if you have mana available. If you attach the Wicked Roles to Charming Scoundrel, they will fall off when it is blinked, causing opponents to lose life.