Using version: ChanceCubes-1.12.2-3.2.2.236
MC 1.12.2
Forge 14.23.4.2759

When left clicking with the single use reward selector pendant, with a custom reward on the chancecube. First click it plays the sound of the block. Then with the next click it spawns the stucture.

Example of a block:

{
"KitchenGunTwinkieman5": {
"chance": 0,
"Command": [
{
"command": "/playsound kitchenguntwinkieman5 voice @A[r=25]",
"delay": 1
}
],
"Schematic": [
{
"fileName": "KitchenGunTwinkieman5.ccs",
"falling": false,
"delay": 0,
"relativeToPlayer": true
}
]
}
}