Level 6

Level 6 covers all the use cases of level 4 and level 5:

Ser
6. The material something is made of
7. Essential qualities (what makes this person/thing, this person/thing)
8. Possession
9. Relationship of one person to another

Estar
4. Emotions, feelings, moods
5. Permissions, restrictions, and consent
6. Many idiomatic expressions (proverbs and sayings)

¿Preparad@? ¡Vamos a aprender a tope!