"artifact 4"
"artifact 4" is one of the twenty-one artifacts in StrikeForce Kitty 2. It appears to be an Energy Tank.
This artifact can be obtained by random chance of using a GOLD LOTTERY TICKET, with the chance for this specific artifact increases with progression. It can be dragged to a kitten wearing the "Cragman" costume to transform into a super set called "Tankman".
A similar artifact also appears in the Steam version of this game.