
The Common-tier HP rune, Uncommon rarity: base stat HP +400 at 20 CP for 1 energy. One of the four tiers of the HP rune line for carried items.
Common HP Rune
Uncommon · HP +400

Database · Runes · HP line
The Common-tier HP rune, Uncommon rarity: base stat HP +400 at 20 CP for 1 energy. One of the four tiers of the HP rune line for carried items.
Uncommon · Common tier · HP stat line
Source
Rift System · Holo-Battle Sim
Source
Adventure Rank · Chest

The Common-tier HP rune, Uncommon rarity: base stat HP +400 at 20 CP for 1 energy. One of the four tiers of the HP rune line for carried items.
Uncommon · HP +400
The game's item data lists 2 sources for the Common HP Rune: Rift System · Holo-Battle Sim, Adventure Rank · Chest. The Holo-Battle Sim rift is the recurring farm for every rune tier.
It grants HP +400 as its base stat, weighs 20 CP and costs 1 energy to socket. It is the Common tier of the HP line, whose four tiers run Common (Uncommon), standard (Rare), Advanced (Epic) and Premium (Legendary).
No published build on this site recommends the HP line yet; the recommended-build panels on the Aniidex pages will pick it up as soon as one does.