Bedrock

Bedrock  is a indestructible  Block  found at the bottom of most Dimensions and at the top of the Nether.

Use
Bedrock has no use apart from being used as a indestructible base if the player can scrap the Bedrock from a Dungeon.

Its purpose is to block off certain areas not meant to be accessed or be accessed another way.

Found
Bedrock is found in every dimension, including the Orespawn dimensions. They also make up some Orespawn Dungeons as well as making up simple things such as the portal in The End.

Mod From
Bedrock is from Vanilla Minecraft.