Incendiary Core
"Scavenged hunks of cerulean minerals, containing materials used for building and improving incendiary turrets ." Required to upgrade the Incendiary Turrets and Sniper Turret. This item can be purchased via the Store, won via Zoot's Loot, given as a prize in the Defense Simulator, or found in a Terraknor Box.
Cost
Winning an Incendiary Core from Zoot's Loot