Create a Passive Blueprint

Passives are components added to characters that fire automatically on a timer.
All passive weapons derive from UBasePassive.

1. Create the Blueprint

1. In the Content Browser, right-click → Blueprint Class.
2. In the search bar type BasePassive and select it.
3. Name it BP_Passive_<YourName> (e.g. BP_Passive_FireOrb).
4. Save it in Content/Blueprints/Passives/.

2. Mandatory settings

Open the Blueprint and go to the Details panel (root component selected).

Property	Category	Description
IsTankPassive	Role	true = tank character, false = squishy character
Cooldown	Stats › Time	Array of floats — one entry per level (levels 1–5). e.g. [2.0, 1.8, 1.6, 1.4, 1.2]
ProjectileBP	Projectiles	Array of projectile Blueprint classes — one per level. Must be filled if this passive shoots projectiles.

Level indexing: The arrays are 0-indexed internally but the passive starts at level 1 (Level = 1).
Always provide 5 entries in each array (one per upgrade tier).

3. Targeting

Property	Category	Options
TargetOverride	Behavior › Targeting	OwnerTargetChain (default) — uses the character's targeting logic. ClosestEnemy / ClosestAlly — ignores the character's target chain. StraightAhead — fires in the owner's forward direction.

4. Optional behavior

Property	Category	Description
bIsParentedToOwner	Behavior	Attaches spawned projectiles to the owner. Set InitialSpeed = 0 on the projectile to keep it stuck.

5. Add to a character

1. Open the character Blueprint (e.g. BP_Character_Tank).
2. In Components, click Add Component → search for your passive BP.
3. The component starts automatically at BeginPlay.

Complete example — fire orb

BP_Passive_FireOrb
  IsTankPassive     = false
  Cooldown          = [3.0, 2.5, 2.0, 1.8, 1.5]
  ProjectileBP      = [BP_Proj_FireOrb, BP_Proj_FireOrb, BP_Proj_FireOrb, BP_Proj_FireOrb, BP_Proj_FireOrb]
  TargetOverride    = ClosestEnemy