Good Gifts include:
Sharpness II Book
Power II Book
-Protection I Book
-Projectile Protection I Book
-Fortune I Book
-Punch I Book
-1 Diamond
-1 Golden Apple
The bad gifts include:
-Slime bloc
-5 seconds of poison I
-1 minute of mining fatigue
-Coordinates broadcasted
-1 heart of health lost
-Nothing happening
-Lit on fire
-Spawns a Wither Skeleton