Does seasonal boost for catalyst apply to all weapons from past seasons too?

[bright helm]

Completing old catalysts cause I am lazy also where do you cosmology kills consistently for Grav Lance?

[vague jackal]

Iirc seasonal boost only affects catalyst obtained from that season's weapons

I.e. the ice Bow and quicksilver

[bright helm]

[vague jackal]

Oh and for the farming, go to shuro chi