Rarity and Level
Similar to Heroes, Extensions have different Rarity Classes and can be leveled up. Original Extensions can be Leveled up, whereas Replicas do not have a level at all. Here's an Overview:
Rarity Class | Max Level |
C - Common | 60 |
U - Uncommon | 70 |
R - Rare | 80 |
E - Epic | 90 |
L - Legendary | |

MYZO indicated the Rarity
Similar to Heroes, the supply limit for Extensions are tied to the Rarity Class. A good indicator for Rarity is also something called Myzo. This means the amount of times a certain Extensions can still be dropped in this Node. If you want to see the supply limit of an Extension, check out the Extensions details page:

This Legendary Extension is limited at 20

This Legendary Extension is limited at 20
Last modified 1yr ago