You have Darkvision with a range of 90 feet and have truesight with a range of 10 feet.

You are part of a lineage that grants you supernatural abilities. Choose a lineage from the Demensional Lineages table. You gain the level 1 benefit of that lineage.

When you reach character levels 3 and 5, you learn a higher-level spell, as shown on the table. You always have that spell prepared. You can cast it once without a spell slot, and you regain the ability to cast it in that way when you finish a Long Rest. You can also cast the spell using any spell slots you have of the appropriate level.

Intelligence, Wisdom, or Charisma is your spellcasting ability for the spells you cast with this trait (choose the ability when you select the lineage).

You have proficiency in the survival, Perception, or animal handling skill.

You don’t need to sleep, and magic can’t put you to sleep. You still finish a Long Rest in 8 hours, but you spend those hours in a trancelike meditation, during which you retain consciousness.

It's hard to hit vital spots when they don't exist. You can die like how slimes do, destruction of your "core", but similarly, it's a bit harder if you don't know what you're doing.