Large earth coins are immense weapons formed through the use of earthbending that are often used as projectiles, thrown at opponents through the use of bending. The large earth coin is one of the earliest weapons in the world, long preceding even the foundation of the Earth Kingdom. The coins can be positioned side-by-side for a defensive, mobile wall or stacked to build a makeshift lookout tower. Skilled earthbenders can use these ten-foot diameter coins as a vehicle by riding in the three-foot wide hole at their centers.
Large earth coins were used during wars around 9,800 BG. AvatarWan died after participating in a battle that saw extensive use of these weapons.
These coins were used as a weapon again by an Earth Rumble VI contestant, The Big Bad Hippo. He swung one of the coins around in an attempt to knock down Toph, though she defeated the triple threat of The Big Bad Hippo, The Boulder, and the Headhunter by turning one of these large coins embedded in the floor of the arena with her earthbending, causing the Headhunter to collide with the other two competitors.
The partially destroyed earth coins from Wan's final battle remained scattered around the outskirts of the plains village for the next ten millennia and were all that was left of the fight. PrinceZuko passed by these coins in 100 AG while en route to the village.
A small version of these coins, referred to as "earth discs", are used in pro-bending as the sole ammunition for earthbending contenders and are accessible via dispensers scattered throughout the arena floor. They were also employed by earthbending soldiers in the United Forces' navy as they attempted to destroy the squadron of Equalistbiplanes attacking the First Division.
Earth coins are physical representations of the Earth Kingdom insignia.