Quincunx

Quinconce (Quincunx) The arrangement of five units in the patter corresponding to the five-spot on dice, playing cards, or dominoes. A quincunx is often used in Hoodoo as a sort of "artifical crossroad" and can be created inside a room in the house. The quincunx or five-spot is generally used for scaling and fixing spells in place. – Pad of Definitions (2.11 Playthings), Official Website

"You see this pattern here? That's a quinconce, that's a five spot."

"That's used for hoodoo spellwork, isn't it?"

"[...] You fill [this flowerpot] with blood root and you've got yourself a powerful charm to war off enemies."

The reference and symbol appears to be derived from Lucky Mogo.