Effect was triggered by an active item owned by the player
1 << 3
USE_ALLOWNONMAIN
Allow the effect to trigger on non-main players (i.e. coop babies)
1 << 4
USE_REMOVEACTIVE
D4 only: Reroll the player's active item
1 << 5
USE_CARBATTERY
Effect was triggered a second time by Car Battery (or Tarot Cloth for cards)
1 << 6
USE_VOID
Effect was triggered by Void
1 << 7
USE_MIMIC
Effect was mimicked by an active item (Blank Card, Placebo)
1 << 8
USE_NOANNOUNCER
Never play announcer voice
1 << 9
USE_ALLOWWISPSPAWN
This allows an item to spawn wisps when called from another item usage as the wisps generator checks for NOANIM, so usually you want to use this with NOANIM call
1 << 10
USE_CUSTOMVARDATA
If set, forces UseActiveItem to use the CustomVarData argument instead of the active item's stored VarData
1 << 11
USE_NOHUD
Don't display text in the HUD (this is currently only used by Echo Chamber)