5b1-2. Eternal Heraldry

Eternal Heraldries are Stats Heraldry with a signature blue to their emblems. You can obtain them in the Dimensional Rift (Blue portal/Heraldry route). Though every boss is guaranteed to drop one Eternal Heraldry, the rarity (ranging from Magic to Unique) and type are all random, and they can’t be evolved. You can also get them at random from pouches at the Stage Store, in exchange for Eternal Heraldry Enhancement Box Fragments, which also drop from the Heraldry route of Dimensional Rift.

Due to their much higher stats, it’s recommended to use Eternal Heraldries over Vibrant Heraldries even without extra Critical (an Eternal Fatal Heraldry can easily cover the loss).
If you’re interested, you can see exactly what stats they offer in the patch note under the heading ◆ Eternal Enhancement Heraldry Basic Stat Info.
Unlike Vibrant Heraldries, Eternal Heraldries are completely tradeable (Seal Stamps required) so you can get what you need or sell what you don’t at the Trading House. Selling excess to NPCs is also an option if Seal Stamps are not available for you, as they catch a high rate at NPC shops.