The Invasion Sheild is a machine built by Jason Yelloweagle and manufactured by Yelloweagle Co. to prevent Jolly Roger from sending an invasion to an island. It was built on 7/26/1722, and for now is only set up on Yelloweagle's Paradise but can be sent to anybody who pays. Here is a picture of it.
The Pirate SheildEditThe Pirate sheild is another product invented and built by Jason Yelloweagle and manufactered by Yelloweagle Co. and was also made on 7/26/1722. It was made to prevent pirates (also anybody else that you don't want to come) from entering. When they enter it sends them right back to Tortuga. Here is a picture of it.
20 pieces of gold