When this card declares an attack while "Necrovalley" is on the field: You can target 1 face-up monster your opponent controls; change that target's battle position.
|How to Obtain?|
- This card can be searched by Chaos Zone, Magician's Circle, and Gravekeeper's Recruiter.
- Use Gravekeeper's Priestess to treat the field as Necrovalley and enable Assailant's effect.
- Many high-Level monsters have DEF disproportionately lower to their ATK, use Assailant's effect to shift them into defence position during the battle step.
- The same can be done in reverse with monsters such as Labyrinth Wall with 0 ATK but high DEF; shift them to attack position.
- You can only activate this card's effect during its own attack declaration.
- This card's effect targets any 1 face-up monster the opponent controls.