Adaptable Trophy in Resonance: A Plague Tale Legacy

Kill at least 1 enemy with each blade

Silver trophy

Get a kill with each of the eight Blades from Plunderer, so find them all first. The preorder Hero's Blade does not count. You cannot switch Blades during a fight.

Equip a Blade under Touchpad > Sophia > Blades.
Kill one enemy with it, for example in the first fight of Chapter V, Desolation It Wrought, sub-chapter Battle grounds.
Restart from the checkpoint (pause menu), switch to the next Blade and repeat.

Watch out

If it does not unlock after all eight, get another kill with each Blade. If it still does not unlock and you own the preorder Heritage Pack, uninstall the pack (on the PS5 home screen, the game's options > Manage Game Content) and try again.