Season II (Atlantis), Season III (Valhalla), and Season IV (Underwild) Heroes have a chance to be obtained from their respective Summon Gate, each of which opens for a few days every month.
Players can make free Summons at these Gates by earning coins through clearing Season II, Season III, and Season IV Provinces. These coins are specific to each Season.
Please note that each of these Summon Gates can also summon Classic Heroes. You can always check the exact probabilities by tapping the blue circle icon with an "(i)" in the top left corner.
- Information on other kinds of Heroes can be found here.