For practicing layers interactions
https://blogs.magicjudges.org/articles/2014/02/25/how-to-teach-the-layers/

1 Copy Effects
2 Control-Changing Effects
3 Text-Changing Effects
4 Type-Changing Effects
5 Color Changing Effects
6 Ability Adding or Removing Effects
7 A Effects from Power/Toughness affecting CDAs
B Any Power/Toughness setting effects
C Any Power/Toughness changing effect that doesn’t set
D P/T changes from Counters
E Effects that switch P/T
8 Game Rules