Lv 1
More max health, and you heal a little faster.
Max HP 20
Lv 2
Sturdier again.
Max HP 40
Lv 3
Sturdier still.
Max HP 60
Lv 4
Tough as old oak.
Max HP 80
Lv 5
The heart of the oldest tree.
Max HP 100
Pairs with Hearth Glow
Ring count: a lot. Do not ask its age.
Emberloop is a free bullet heaven game for your browser, on a phone or a computer.