Water
bending
Earth
Bending
Fire
Bending
Air
Bending
Avatars
400

According to Iroh, water is the element of what? 

Change

400

What metal can earthbenders not bend?

Platinum

400

What is the name of a firebender dual?

Angi Kai

400

What dark air bending technique did Zaaher use on the Earth Queen?

Suffocation

400

How old was Kuruk when he died?

33

800

Who was the first known person to blood bend without the moon?

Yakone

800

What was the name of the desert sandbenders lived in?

Si Wong

800

What season are the most firebenders born in?

Summer

800

Which temple had upside down buildings?

Western

800

What Wan's animal companion name?

Mula

1200

What tribe did the Foggy Swamp people originally come from?

South

1200

What was Toph's braclet in book 3 made out of?

Meteor

1200

What was the name of the ancient firebenders?

Sun Warriors

1200

What was the reason for air nomads to be nearly made up of 100% airbenders?

Their spiritual connection

1200

What number earth king asked helped from kyoshi who in turn made the Dai Li for him?

46th

1600

What leafy plant was used to make the sound of bending ice?

Lettuce

1600

Who did toph first see lavabend?

Sun

1600

What was *one* of the names of the last two dragons in Atla?

Ran and Shaw

1600

Who was the monk who unlocked airbending ~4,000 years ago?

Laghima

1600

How did the nuns figured out Yangchen was the avatar (her suddenly talking to past avatar ?

Her suddenly talking to past avatar companions

2000

How much was the waterbending scroll worth?

200 gold pieces

2000

What cave was considered the birthplace of earthbending?

Secret Tunnel~

2000

Who was the fire lord in the early days of Yangchen?

Gonryu

2000

How did the fire nation hunt down the survivors of the initial airbender massacre?

Using relics

2000

Name one of the past avatars who have been named but have yet to appear/we don't know much about

Salai, Gun, Zalir

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