| Fortify |
| Japanese Wiki: 3279
Fortify is a keyword action.
It is the act of of attaching one of your Castles to your shields.
While a shield is fortified, when the specified shield is broken or destroyed you may put the Castle into your graveyard instead of the shield.
From the Duel Masters - General Game Rules: Version 1.9 (August 9th, 2018)
- 701.19. Fortify
- 701.19a To fortify a castle is to specify it in the zone it's in (usually the hand), pay its mana cost and attach it to a shield. Usually, fortifying is possible only during a player's main step.