Once A Minion has developed some skills and built a Treasure Chest they will be granted access to their Minion Mail where messages come in from game characters to help further certain story threads.
The Elemental Arborist needs a "Beware Of Hole" Sign to ward off the locals and says to inform you "I can't handle a legal dispute right now so please hurry before a customer falls in." - Diabolic Delivery
"Your not so bad young minion! 10% off all items when you shop at any Gremlin shop in the realm." - Gremlin Merchant
"I have need of branches blessed with a child's joy to complete a concoction I'm working on. Offer the branches and I'll identify your item." - Elemental Arborist
"I know what you're planning and I'll tell...unless you take me with you. Meet me at midnight near the Gremlin's Empty shop." - Unsigned Letter
The world moves with each step you take.