Aurora, Dreaming Guardian is the ideal combo card, working with the rest of your Sapphire deck to keep that lore going up and your characters safe
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With the recent rise of ruby/amethyst control, steel has been shaving copies of Fire the Cannons and Grab Your Sword in favor of cards like Beasts Mirror to try and keep up with the opponents card draw
There are very few cards currently in Lorcana that interact with your opponents lore count, but the majority are in ruby
For example, in August 2023, Twitter user GGKeezee posted a video where they weighed 100 foil and 100 non-foil Lorcana cards
Some of the most effective combos in the game follow this same model, while others feature more aggressive or defensive pairings