That is the deepest level of hades. The prison which is eternally frozen.
[AUTO](VC)[Limit-Break 4](This ability is active if you have four or more damage):When this unit attacks a vanguard, this unit gets [Power] +5000 until end of that battle. [AUTO]:[Counter-Blast 2] When this unit is placed on (VC), you may pay the cost. If you do, choose a from your drop zone, and call it to (RC).