Events (Tent sales)

Armorer

Provides armored tools that are more superior to others that you can buy at your castle. He comes around every now and down with his items. Some of these items which can be purchased by rubies are: belfry, Machicolation (MURDER HOLES), heavy rams, arrow slits, fire moats and wall shields to name a few that can be purchased by rubies. You can also purchase normal tools with coins instead of resources. They are made without a wait.

Traveling Merchant

He claims to be a TRAVELING Merchant but his wheels don't move very far from the front of your castle. You can purchase a lot of stuff you might need in a hurry with rubies from him.

Architect

Allows you to use his plans for free to build further extensions on castle buildings. You still have to pay the construction costs.

Researcher

Various items you can only research when the researcher is here. A lot like the architect, comes at random times.

Mercenary Post

This store allows you to buy troops, tools and resources for coins. Sometimes there are good deals and sometimes it's overpriced. They come as ordinary, rare, epic and legendary but things are just mixed around. Some lower levels get free ones. It's like a yard sale, maybe that junk to someone else is a great find to you.

Barterer (may have retired)

Shadow Mercenary

These are attack troops that you can buy and your identity will not be revealed. Important to note each attack will be a random spot on the map (not your castle) and they will always give 90 minutes warning of attack. You will not have the element of surprise. 

You must use shadow tools with your troops. This can be expensive but if you need revenge and it will prove disastrous to attack under you name this is an option.

Plague camp

Similar to sabotage. But you are sending disease instead of fires. Same idea but it doesn't fail so your identity is hidden. Not free, costs rubies.

Technicus

This is like a slot machine, you keep putting more and more coins hoping to hit it big. It's useful but beware of your bank account.

Tip: If it fails 3 times move on. If it fails once, go to the third time, success can happen and 3 times a charm.

Equipment Trader 

For rubies you can purchase equipment

Buy your commander and castellan if you don't mind not knowing what you are going to get. He looks trustworthy though.

Wheel of Fortune

You can get some nice prizes. I got the rubies from a free spin. But it's a lot of shiny flashy colors but it seems like a big gamble. Use sparingly unless you buy rubies regularly.