Frontline Base
| Name | Frontline Base |
| Card Type | Spell Card |
| Property |
Continuous 
|
| Passcode | 46181000 |
| Status (TCG) | Unlimited |
Once per turn: You can Special Summon 1 Level 4 or lower Union monster from your hand.
Expansions
| 2020-11-26 | Speed Duel: Battle City Box | SBCB-EN075 |
|
| 2016-10-20 | Structure Deck: Seto Kaiba | SDKS-EN029 |
|
| 2010-02-19 | Machina Mayhem Structure Deck | SDMM-EN025 |
|
| 2005-03-19 | Dark Revelation Volume 1 | DR1-EN083 |
|
| 2004-01-19 | Magician's Force | MFC-028 |
|