How do you upgrade a dragon's habits (passives) in Dragonfire?

Every dragon has 5 habits (permanent passives), each over 5 levels — 25 cells per dragon. The life of a habit:

1. Locked at the start (the slot is gated by stars).
2. Unlocked → level 1: you need the right Star Rank tier plus the first materials from chests.
3. Raised 1 → 5 with 2 ingredients: a Breedmark (matching Champion / Warrior / Hunter / Sentinel) and a Core of the right rarity (🔵 / 🟣 / 🟡).

A cost seen in game: 100 Breedmarks + 100 Cores per tier, rising at the higher levels. It all comes from chests, and it's permanent.

Priority: raise the set habits ⭐ first — the ones whose text reads "[Order] grants" — because they multiply the dragon's active Order.