Publisher's blurb:
This giant cube built into a frozen cliff holds great magical potential. The one-shot adventure written for this map takes your players on a bounty-hunting quest, only to have to make a choice–take their bounty in, or let him use the cube to travel back in time for an important mission…
Note that this adventure has an incredibly unique encounter involving teleporting your players to different planes of existence, and it’s written to use four of our other maps during the fight (Aztec Ziggurat, Universe Creation Forge, Devil’s Battle Cube, and Broken Planar Datacron). If you don’t want to do that, you can modify the encounter to run without them. All that requires is to make the cube generate enemies rather than teleport your players, and it’s this frozen cube which also has the ability to time travel.