V1.4.2Tactical Cauldron Guide & Simulator

Master the art of item fusion with our comprehensive Tangy TD Cauldron Guide. Test crafting theories without risking a disastrous run in Endless Mode. Use the simulator below to figure out how to forge the ultimate Legendary items and discover hidden synergies like the Venom-Frost combo.

Inventory

Drag or click items to place in the Cauldron

The Great Cauldron

Combine identical items to upgrade their rarity, or mix specific materials to forge entirely new relics.

Slot A

Slot B

Official Recipe Archive

Legendary Synergies

Element Infusions

How the Cauldron Works

Basic Upgrading (Stacking)

If you put two of the exact same item into the Cauldron, it acts as a stacking upgrade. The resulting item will always be the next rarity tier of that item. For example, two Common Recurve Bows will yield one Uncommon Recurve Bow.

Essence Fusions

Combining a base weapon with a specific Material or Relic (like Fire Essence) will completely morph the item into a new unique variant. Use the simulator to discover these secret fixed recipes.

Same-Tier Rerolls

Putting two entirely different items into the Cauldron that do not share a specific fixed recipe will execute a Reroll. You will be given a choice of a new item from the same tier.