The infect mini-cube has the following artifacts:
Here are artifact creatures with Infect.
These are added for flavor. The replicas have mana abilties, and these three are the ones for blue, green, and black. I have also included Vector Asp.
Here are additional cards, either added for playability, or because they have Infect.
This proved to be a very playable card.
There are trigons for the five colors, but the only one with Infect is the green one.