Why do some spell cards have really tiny health bars?It makes it so much more difficult to get the cancels right.. what's the reason for it? it's so annoying!
Which spellcards in particular do you mean? In some cases it's due to how much time you spend not under the boss, so the health bar is lower to compensate, making homing types kill it faster (DDC SakuyaA vs. Kagerou is a good example of this). In others it's due to the pattern being intense and if it went on longer it wouldn't be fair (Eternal Meek).