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Formulas are old, they were removed from the game when 3.0 was released, you used to need them to do metallurgy in the armory, tiger was for the yellow synthesis stones, and cohesion was for energy stones and weapon pieces. They removed the whole system so that you can synth unbound items and not get back a bound piece, because it was rare to find an unbound Formula.
> *Originally posted by **[huntlol](/forums/74/topics/301836?page=1#posts-6412518):***
> but i still have my formulas on dragon’s lair
Sell them, they have no use and just take up space in your backpack.