- Race: Rats
- Type: Upgrade
- Tech requirements: Laboratory
- Built where?: Laboratory
- Build cost / time: 2 water, 2 ambria / 3 turns
- All of your rats gain +1 piercing armor.
- Attributes: none
To bring Chainmail into play, you must have a ready Laboratory. Pay the cost of Chainmail (2 water, 2 ambria), place it face down underneath the Laboratory, and engage both cards 3 turns.
When Chainmail finishes being researched, place it to the side of the playing area. It cannot be discarded or affected by other players for the remainder of the game.