The Snowbeast is an enemy that appears in the Dimensional Vortex. The fact that it is fought in a snowy biome and is a palette swap of Heckran likely makes the monster a reference to the original SNES cover of Chrono Trigger that had Crono, Marle, and Frog facing Heckran or a similar monster. Amusingly, using Frost Arc, as is depicted in the original cover, is a bad idea, as it heals him.