public static boolean canDoDamage(double damage, Creature attacker, Creature defender, Item weapon) {
        logger.info(String.format("canDoDamage from %s to %s with %s - %.1f", attacker.getName(), defender.getName(), weapon.getName(), damage));
        return damage > 1D;
    }

    static void patchCombatDamageCheck(ClassPool classPool) throws NotFoundException, BadBytecode {
        CtClass cls = classPool.getCtClass("com.wurmonline.server.creatures.CombatHandler");
        CtMethod method = cls.getMethod("setDamage", "(Lcom/wurmonline/server/creatures/Creature;Lcom/wurmonline/server/items/Item;DBB)Z");
        MethodInfo methodInfo = method.getMethodInfo();
        CodeAttribute codeAttribute = methodInfo.getCodeAttribute();
        ConstPool constPool = codeAttribute.getConstPool();
        CodeIterator codeIterator = codeAttribute.iterator();

        // Scan through all the bytecode - look for a multiplication followed by comparing
        while (codeIterator.hasNext()) {
            int pos = codeIterator.next();
            int op = codeIterator.byteAt(pos);
            if (op != CodeIterator.DMUL) continue; // not multiplication - continue
            op = codeIterator.byteAt(++pos);
            if (op == CodeIterator.LDC2_W && codeIterator.byteAt(pos + 3) == CodeIterator.DCMPL) {
                // found the pattern, check the value it's comparing to
                int ref = codeIterator.u16bitAt(pos + 1);
                double val = constPool.getDoubleInfo(ref);
                if (val == 500.0) {
                    // here it is, generate new code to insert
                    // We'll be calling canDoDamage, the first parameter (damage) is already on the stack, prepare the rest
                    Bytecode newCode = new Bytecode(constPool);
                    newCode.add(Bytecode.ALOAD_0); // this
                    newCode.addGetfield(cls, "creature", "Lcom/wurmonline/server/creatures/Creature;"); // this.creature
                    newCode.add(Bytecode.ALOAD_1); // defender - first parameter of setDamage
                    newCode.add(Bytecode.ALOAD_2); // weapon - second parameter of setDamage

                    // call our methor, result is left on the stack
                    newCode.addInvokestatic(
                            CombatChanges.class.getName(), "canDoDamage",
                            "(DLcom/wurmonline/server/creatures/Creature;Lcom/wurmonline/server/creatures/Creature;Lcom/wurmonline/server/items/Item;)Z");

                    // The code we're replacing is 4 bytes - LDC2_W, 2byte reference and DCMPL
                    // Insert a gap for to match the size of the new code
                    codeIterator.insertGap(pos, newCode.getSize() - 4);

                    // And put the new code
                    codeIterator.write(newCode.get(), pos);
                }
            }
        }
    }