# Fusion ## Fusion logic The Legend Isla is where users can get high rarity NFT items by merging NFT items together. The fusion progression costs

Elixir and

MSTR. Fusion progression requires 4 **"Unlocked"** items with rarity from

Uncommon to

Epic: * **1 Main target item:** That will be upgraded to higher rarity rank item. Item type and race (if have) will be kept same as the Main target item. The Main target item require a certain level requirement: * **Mongens:** level 20+ * **Plots:** 50% max level (round up) * **3 Sacrifice items:** same item type and rarity level with the Main target. As a quick refresh, each Mongen consists of 6 different body parts, including Form, Head, Eyes, Horns, Tail and Back. The fused Mongen will be born based on gene of the Main Mongen and 3 Sacrifice Mongens. Each Mongen gene contains: * Main Trait: Body parts of Main-Mongen * Sacrifice Trait: Body parts of Sacrifice-Mongen * Up Trait: Higher rarity body parts of Mongen race The traits define the personality of each Mongen and these are randomly created. In other words, each trait has different probabilities of appearing in the next Breed. You can check table of the probabilities that have to appear the traits below:


Body parts	Main Trait	Sacrifice Trait	Up Trait
Form	0%	0%	100%
Head	24%	6%	58%
Eyes	42%	6%	40%
Horns	46%	6%	36%
Tail	28%	6%	54%
Back	40%	6%	42%

The fused item will be reset to level 1. And fused Mongen will be transform back to Soulcore that require hatching progression. Item types are used for fusion included: * Mongen * Landcore * Habitats * Food Storage * Farm * Breeding Den * Hatchery * Training Ground * Watchtower * Turret * Military Camp * Landmine ## Legendary Mongen Exclusive Fusion Legendary Mongen will be limited to 25 Mongens each season (3 months). These Mongens will receive a exclusive effect.


Date release	Mark name	Mark icon	Mark effect
January 11th, 2023	The Mightiest Five		After this mongen defeats mongen or troop by using skills, heal itself equal to 5% of its max HP.

## Fusion cost data {% tabs %} {% tab title="Rare" %} | **Item type** |

**Elixir cost** |

**MSTR cost** | | :------------------------------: | :-----------------------------------------------------------------------------: | :---------------------------------------------------------------------------: | | Mongen | 20000 | ~~8~~ -> 240 | | Landcore | 12000 | 5 | | Habitat | 5000 | 2.2 | | Food Storage | 3500 | 1.54 | | Farm | 1800 | 0.74 | | Breeding den | 3000 | 1.25 | | Hatchery | 3000 | 1.25 | | Training Ground / Training Field | 6000 | 3.84 | | Watchtower | 6000 | 3.84 | | Turret | 6000 | 3.84 | | Military Camp | 6300 | 4 | | Trap & Landmines | 600 | ~~0.3~~ -> 3 | | {% endtab %} | | | | {% endtabs %} | | | --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.monsterra.io/legend-isla/fusion.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.