UsePuzzleItem

From ZDoom Wiki

129:UsePuzzleItem (item, script)

item: Puzzle artifact number
script: Script to execute

Executes a specified script if the player holds the specified puzzle artifact, and removes the artifact in the process. If the player doesn't have the artifact, this plays the *puzzfail player sound instead. This special must be placed on a thing or a line and cannot be used in a script.

Standard puzzle artifacts (class names):

0  Skull
1  GemBig
2  GemRed
3  GemGreen1
4  GemGreen2
5  GemBlue1
6  GemBlue2
7  Book1
8  Book2
9  FlameMask
10 FWeapon
11 CWeapon
12 MWeapon
13 Gear1
14 Gear2
15 Gear3
16 Gear4

This special can also be put on any thing in the map. If that is the case and the player uses the item near this thing the special is also executed.