Adventure Time Munchkin: Why is Flame Princess/Prince so bad?

[PreZZ PreZZ]

I just bought Adventure Time Munchkin, and (as a fan of munchkin and adventure time) I'm enjoying it a lot. I like playing as the Flame Prince, but his effect is so bad. It reads something like: "You may choose to have any of your items be treated as fire/flame items. Also, all items which are already fire/flame items get an extra +1 bonus." Fire/flame attacks count as double againts the Ice King. That's the only time when the first effect is useful. There is one equipable flame item: the "flame sword" and I believe only a single "one-shot" item that counts as a fire/flame item. So Flame Princess ability is significantly lacking, compared to the other characters. For example: Lady Rainicorn gets a +1 bonus to her run away, and may choose to take a treasure card instead of a door card when looting the room.

So why is Flame Princess/Prince so bad? Am I reading the effect wrong? Are there other fire/flame items that I somehow missed? If not, does anyone have any good house rules for Flame Prince?