Arcane Vortex is a Monster Room introduced in the Portable Power Expansion Pack.
The color palette is meant to mimic the colors of the screen of a classic Game Boy.
Due to the Portable effect of this card, one could move this card to a space where it will easily kill Heroes to activate its kill effect. The player can place the card back in their hand while it is in their dungeon, only to rebuild it again. This card works well with rooms that have a "cycling" effect.