Q. Can Calling Circle (O) and Calling Circle (D) be destroyed?
They cannot be destroyed.
Q. Do reinforcements appear when a Hero occupies a Calling Circle's space?
If a Hero occupies a Calling Circle's space, the reinforcement will appear in a nearby open space. If, through things like enemy Divine Vein (Ice) effects, there are no open spaces on the map, including your team's Calling Circle's space, then the reinforcement will not appear.
Also, they will not appear on spaces with unactivated traps, including Decoy Traps. They will appear in spaces where traps have already been activated or in spaces once occupied by structures that have since been destroyed.
Q. Why did I lose the battle without my reinforcement appearing?
If your entire team is defeated before the reinforcement appears, you will lose the battle.
Also, there are conditions for using the reinforcement slot. Please review the following Q&A as well.
Q: Why can't I use the reinforcement slot? I have a Calling Circle structure set.
In order to use the reinforcement slot, you must have a Mythic Hero (mentioned in the note below marked with an *) of the current season with the Raiding Party Call or Defensive Team Call mythic effect.
Additionally, the reinforcement slot cannot be used during Chaos Season.
Note that only the following Heroes can be set in the reinforcement slot:
- Legendary Heroes of the applicable season.
- Mythic Heroes of the applicable season. For raiding parties, these are Light and Astra. For defensive teams, these are Dark and Anima.
- Heroes who have been granted the blessing applicable to the season. For raiding parties, these are Light and Astra. For defensive teams, these are Dark and Anima.
*About Mythic Heroes with reinforcement slot Mythic Effects.
ThisThis refers to Mythic Heroes with Mythic Effect 3, such as Rune: Source of Wisdom.