Flame Barrier isn't a card which scales well with most of Ironclad's card pool, but its output is immense. There are enemies who attack you 8 times in the same turn in this game, and a Flame Barrier+ will deal 48 damage to them if you can line it up appropriately. Ironclad never really wins with a "Flame Barrier" deck; there just aren't enough other effects to support this card for it to sensibly win by itself. But I've definitely taken it over other strong cards because its output is so high.
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