User blog comment:SpiritedDreaming/RWBY Tower Defense Game: Attack on Kevin Take 3/@comment-26397825-20161129122833/@comment-26397825-20161129125922

Yeah, that's why I made it do less damage. Trying to come up with something to balance out the 'guaranteed hit' thing for the lightning breath in line with the guaranteed hit for the ship cannons is a bit harder, since there isn't a pair of Huntsmen or other Grimm helping the dragon.

So less damage for a guaranteed hit, plus a guaranteed 5 damage each day if it doesn't get activated, giving it a total of 15 damage per day with only one activation.

The ship has a total of 15 damage guaranteed hit per day for two activations though...but if the second one doesn't go off then it still has a 25% chance of 15 damage for the day.