anyone know how to get a "dragon scale" or a "twinkling titanite"? i want to reinforce my drake sword and my black knight sword, and how can i buy fire spells or other spells, im a pyromancer.

You can get twinkling titanite from crystal lizards. There's one in left most barrel on the top floor where you encounter the Taurus Demon and there's one in Darkroot Basin kinda near the bonfire on the cliffs by the black knight and the Hydra. The Hydra drops a dragon scale and drakes in Drake's Valley supposedly drop them too, but I haven't gotten one yet so I don't think that's true. There's also a dragon scale you can get from the Undead dragon that's also in Drake Valley. If you made it to Blighttown you can make your way to The Great Hollow which leads to Ash Lake where there's like 5 dragon scales and the dragon covenant. Pyromancer spells can be bought and upgraded from the pyromancer you save in The Depths, he's in a barrel in a room.