Technique Ranking, Tech Rank or simply Rank, is a system used for classifying techniques by their power.
The classification goes from 5 (lower) to 0 (higher):
Level 5 Edit
The lowest level, techniques that have low or no chance of killing.
Level 4 Edit
May kill weak enemies.
Level 3 Edit
May kill enemies at the user's level.
Level 2 Edit
May kill very strong enemies.
Level 1 Edit
May kill extremely strong enemies. Some might hurt gods.
Level 0 Edit
Godly, may kill gods and even destroy entire realms.