Having the option to use Vigor in some spells

I'm still a novice to assembly and haven't done a lot of debugging (except for my own code) so I'm not particularly familiar with common bug-causing scenarios.

I don't code enough to be called an expert. At best I'm pre-intermediate level (so you should consider yourself I think). I still forget a lot of flag setting / clearing by a lot of opcodes, there's still opcode I have no idea what they do and when debugging I still have bugs such as a 8-bit LDA instruction expected but the accumulator is 16-bit.