allomancy, hemalurgy and Feruchemy are of preservation, ruin, and Harmony...
But what of the unknown red metal, the one that allows Paalm the use of other investiture and hides her from Sazed, that creates werewolf koloss and red eye immortals, and what of the "haze of red. All around, pressing in upon the world." "a miasma of dread and destruction"
There is definitely a new shard in town