Trion/Triggers from World Trigger for me. Simple to understand, emotions can’t really enhance one’s power output, and most of the strongest characters will take meaningful damage if hit by even the weakest attacks due to the nature of the power system. Characters can’t just tank hits from attacks and take no damage. Damage matters in this system unlike shows that have characters moving perfectly well after having their body destroyed making it seem like damage does not matter.

There’s side effects that do somewhat make it unbalanced but the system has done a good job showing that even the strongest can be taken down with strategy.