Answer:
There are four of these, but everyone's favorite seems to be spades.
The eight of us go forth not back to protect our king from a foes attack.
What dentists battle on a daily basis
Prior to smartphones, people used this to record their lives.
The King of Pop's stellar dance move
When is it bad luck to see a black cat?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?