Artifact set
Revenge
Set bonus
Revenge
- Set Bonus (1 pcs.): 5% chance to Counterattack when hit
As the game's own text says: 5% chance to Counterattack when hit
Pieces needed for the bonus: 1 (the game's number for this set).
What the pieces look like
Ring
Amulet
Banner
Artwork from the game files. Which pieces and slots a set can drop in is not stated in the game data used here.
Other 1-piece sets
The text is the game's own and has not been tested in battle here. The game data does not say here where the set drops or which champions use it. See Data quality.