A 3/3 with first strike should attack without any trouble, especially when you consider the when a samurai or warrior attacks alone effect
Tips for Using the Secondary Market: Verify card authenticity
Whenever you cast a noncreature spell, create X 1/1 red Phyrexian Goblin creature tokens, where X is the mana value of that spell
Like most Magic: The Gathering cards, the value of Mabel, Heir to Cragflame depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Bloomburrow)
More so than most of the other cards on this list it lets you outplay your opponent as well which is always an indication of good card design
Most magic decks are highly focused one or at most two strategies for winning