Cultivation Realms

1. Body Strengthening Realm

2. Qi Refining Realm

3. Foundation Realm

4. Core Formation Realm

5. Nascent Soul Realm

6. Soul Severing Realm

7.....

Weapons, pills, Rune Formation, Spiritual Creatures follows the Tier System. For example...

Tier 1 Spiritual Creature is equivalent of Body Strengthening Realm and so on.