Railroad Ink: Eldritch Expansion Pack

From BoardGameGeek:

In the multiplayer puzzle game Railroad Ink™, your goal is to connect as many exits on your board as possible. Each round, a set of dice are rolled in the middle of the table, determining which kind of road and railway routes are available to all players. Use the 4 special dice of the Eldritch Expansion Pack in addition to your regular Route dice, and find new ways to score points: Ritual (1 die): open new Portals and add mysterious Rituals to create a Madness Network! Portal (1 die): open different supernatural Portals to connect distant areas of your network! Tentacle (1 die): extend Tentacles along your network as much as you can to get bonus points for each space occupied! Investigation (1 die): send your Investigator to collect Clues to solve the case and gain extra points! Note: at least one core set of Railroad Ink™ or Railroad Ink Challenge™ is required to use this expansion pack.