At first level, an Eidolon may gain advantage on a roll they do not already have advantage on twice per day. At ninth level, this increases to thrice per day. And at 18th level, it increases to four times per day.

As an eidolon, you may choose one skill that you will permanently have advantage on during a skill check. If you were to have disadvantage on this check, you will instead make a straight roll. Upon reaching level 11, you may choose a second skill to permanently have advantage on.

Eidolons, while in the dream world, are given life through the dreams of others. To survive in the material plane, they must have a magical source within them to sustain them. Eidolons in theory could live forever, however they are dependent on their core to survive.

 Eidolons tend toward no particular alignment. In the dream world they can appear as any alignment based on their creator. When brought to the material plane and given a true free will, the creature may lean towards any alignment.

Like the rest of their knowledge, an Eidolon's known languages are dependent upon their creator. A lesser Eidolon may know no languages at all, and in theory they have the capacity to speak every language in existence. Generally, however, an Eidolon only knows Common, and perhaps the native language of their creator.

Eidolons have no set size, and simply are the size that they are upon creation. Generally they are of medium size, but in The Dream World they can be found in many different sizes.

Your base walking speed is 35 feet.