Fusion and Leveling Guide

High-rarity heroes grouped together — Leveling and Fusion turn useful units into long-term carries.

Level the units you actually use, then fuse carefully once you know which units are worth long-term investment.

Leveling Units

Level Up portal — The Level Up area uses Food to raise unit level.

The maximum level you can feed a unit to is your own player level. For example, if you are level 52 and have a level 38 unit, that unit can be raised up to level 52. The current max level in the source guide is 120.

Use Feed Max when you want to quickly raise a unit as far as your current Food and level cap allow.

Where Food Comes From

Story Mode and Story Mode chests
Item Shop
PVP Shop
Dungeons

Spend Food on units you are actively using. Keep a reserve so a new strong unit can catch up quickly.

Fusion Unlock

Fusion portal — Fusion raises a unit's star rank by combining matching-rank units and crystals.

Fusion unlocks at level 10. It upgrades a unit's star level by combining it with three unit sacrifices of the same star rank, plus the required Fusion Crystals and Coins.

Path to Max

Units move through Gold Stars from 3-star to 4-star to 5-star. After 5-star, they move into Red Stars, from 1 Red Star through 5 Red Stars.

Upgrade	Required crystals	Coins
3-star to 4-star	1 Rare Fusion Crystal	500
4-star to 5-star	1 Epic Fusion Crystal	1,500
5-star to 1 Red Star	3 Legendary Fusion Crystals	5,000
Past 1 Red Star	3 Legendary Fusion Crystals	Scales higher

Who to Fuse

Early on, it is fine to fuse units up to 5-star. Do not push past 5-star until you are investing in units that matter long term, especially strong Legendary or Mythic units. Use the Tier List before spending Legendary Fusion Crystals.