Feed The Beast Wiki
Feed The Beast Wiki
Selector: Item Presence

GroupDetection & Focus
Return typeNumber
Slot (optional)Number Constant
Technical details
Registry nameselectorItemPresence

Selector: Item Presence is a Number Spell Piece added by Psi. It will analyze the selected slot (if none are selected it will default to the focused slot—which is modified by
Trick: Switch Focus Slot) and return the number of items in that slot. It is unlocked in the lesson "Detection & Focus."


  • Slot: Requires an integer number constant. Will accept integers inclusively from 1 to 9.

See also


"name" = ""Navbox Psi"" "state" = ""plain""