well-
we have a cold liquid, a cold gas, a cold solid, cold gol, even a cold flame.
answer - no , we don't need any more, we have enough to do for now, unless somebody suggests a mirical.

Cthm

Cold thermite

CLav

Cold lava

Cbho

Cold black hole. The more it sucks in the colder it gets
Uses:extremely cold lasers

there could be some kind of cold nuclear element that would generate mas amounts of cold
something like CFGM dont ask the name is random
state solid
color Light blue
effects it would melt into cold glowing liquid when cooled and generate tonn of cold and that liquid if neutrons react with it
usees can make cold nukes and cool some complex machines

cold GOL and a cold gas, also, +1 to sillu129's idea

@shroom207
explain why we need more cold elments?

@sillu129
+6

@therocketeer
we need more colder element so the tempereature limit of coldness should be raised