Commercial Harbor (2)
You may force each of the other players to make a special trade. You may offer each opponent any 1 resource card from your hand. He must exchange it for any 1 commodity card of his choice from his hand, if he has any.
You may use this ability at any point during the turn you play the card. However, you may only force each player to make this trade with you once that turn.
Your opponent chooses which commodity card to give you if he has more than one. If you offer a resource to a player who has no commodity cards, then you take your card back and the trade is void. You do not have to give this player the resource card.
Master Merchant (2)
Choose another player who has more victory points than you do. Look at the player's hand of resource and commodity cards and choose 2 cards to take and add to your hand.
You can only play this card on an opponent who has more victory points than you. There is no defense against this "trade", even if he only has 1 point more than you.
Place the Merchant on any land hex next to 1 of your settlements or cities. You may exchange the resources produced by this type of hex with the supply at a 2:1 rate, as long as the merchant remains on that hex.
When you play this card, take the merchant and put him on any land hex next to one or more of your settlements or cities.
As long as the merchant remains here (under your control), you may trade the type of resource produced by this hex with the supply at a 2:1 rate (as is the case with a special harbor). As usual, you may also exchange these resources for commodities.
If another player plays a merchant card, he takes control of the merchant and receives the trade advantage and the victory point. If you want to move the merchant to a different hex, you will have to play another merchant card. The robber does not affect the merchant. You also receive 1 victory point for as long as you control the merchant.
Merchant Fleet (2)
You may use one resource or commodity of your choice to make any number of 2:1 trades with the supply during the turn that you play this card.
For the rest of the turn, you may trade one resource or commodity of your choice at a 2:1 rate. You can make as many such trades as you wish. As usual, you may exchange commodities for resources and vice versa.
Resource Monopoly (4)
Name a resource. Each player must give you 2 of that type of resource if they have them.
You may name any of the 5 resources (ore, grain, wool, lumber, or brick). Each player must give you 2 of the named resource if he has them. If a player only has 1 of that resource, he only gives you 1.
Trade Monopoly (2)
Name a commodity. Each player must give you 1 commodity of that type if they have them.
You may name any of the 3 commodities (coin, paper, or cloth). Each player must give you 1 of the named commodity if he has them.