Dragon Horn max jump of 3

That seems to be address 21A350 (or E1/A150). Just remove your zero from the end. The code you are searching for is

C9 10 B0 03 EE 70 3A

Also, note that I haven't tested this code. The line that I'm not sure about is the "C9 10" (aka CMP #$10). If it's not working, a quick-and-dirty solution would be just to replace the last 3 bytes with EA. That way, whether you branch or not, it won't add an attack.

Ah, now I found it; thanks!

I am starting to wonder if I should also disable that 3rd jump... In my hack, the possibility of ultra-powerful attacks have been eliminated (offering + fixed dice, quick, x-magic, etc..) Currently, the most powerful move by far is the jump command with a Dragon Horn. All other attacks are limited to 9999 per turn at this point, but the Dragon Horn can technically do 3x that amount.

Can you tell me which lines the 3rd jump are, and if I just replace with the same code? I might disable that too, if it's not too hard for you to figure out!