The Team Fortress 2 mod is a mod in minecraft (A nonexistant mod, for anyone who can't tell) that allows you to use the weapons and skills of the famous mercenaries of TF2. The mod adds several new mobs and ores, and also a new boss.
Merc ores are the ores that you find to make the mercenary armor and weapon sets. They are-
Speedium for Scout
Rageite for Soldier
Burnite/Pretty Rainbow Pony Blocks for Pyro
Buidium for Engineer
Heavium for Heavy
Bombite for Demoman
Hurthealium for Medic
Crikeyum for Sniper
Backstabbium for Spy
All of the ores are of comperable rarity to diamond, but are much harder to use for several reasons. First, it takes 8 of any ore to make any one peice of any merc armor. Second, they must be smelted not once, but three times. The first turns the ore into "Scrap (Insert name of ore)" The next turns it into "Reclaimed (Insert name of ore)," and the final one turns it into Refined (Insert name of ore)," which can actually be used. As you can see, it obviously uses a ton of coal.
By defeating the machines in the MVM dimension or those that occasionally spawn in the overworld, you can aquire Scrap Metal, which you can use to make the portal to the MVM dimension. If you forge the Scrap Metal in a furnace, it becomes Reclaimed Metal, and forge it again to make Refined Metal, which you can use to make an armor set with 29 armor points, or 14.5 bars of armor. It can also be used to make Refined tools, which are better than their diamond counterparts, and a Refined Sword, which deals 9 attack damage.
All scout armor is made by taking the eqiivelent peice of leather armor and surrounding it with Speedium.
The mod adds several hostile mobs, as well as a friendly mob, the Sentry Gun.