my ava turned into obsidian what do i do

 

Right click it.

 

You can also right click it with a bucket so it will directly go into your inventory as a lava bucket.

 

but my obsidian disappeared

 

It should've turned back into a lava source block. Are you sure it disappeared? The only way to get our obsidian back is by trading or making an obsidian gen.

 

ok ty