How do Heirlooms work in Dragonfire?

Heirlooms are a system of permanent upgrades laid out in 2 trees:

• Dragon Growth (dragon stats)
• Realm Expansion (economy + territory)

How it works:

• You buy upgrades in any order.
• At the centre of each cluster, Amplifiers boost every upgrade connected to them (they advance with Amplifier Seals).
• Every upgrade rank grants a permanent Mastery bonus that is always active, independent of your House Level.

Unlocked upgrades are permanent (cross-reign), BUT their buffs are only active if your House Level (which does reset) is high enough. Four currencies feed the trees: Runic Fragments, Valyrian Tablets, Dragonlord Scrolls, Amplifier Seals.