The symbol and number make this password look strong, but it's a single dictionary word ("dragonfire") with the most common substitutions (@→a, 0→o, 1→i). Attackers apply those swaps automatically, so its real strength is close to the plain word. It's also a short password. The password that uses four unrelated words is the hardest to crack. Length that comes from randomness and not from a pattern is what makes it hard to crack.
