Shrink

Select 1 face-up monster on the field. The original ATK of that monster is halved until the end of this turn.

• This card can be activated during the Damage Step, before Substep 4 - Damage Calculation.
• This effect target's 1 face-up monster anywhere on the field.
• If the target is flipped face-down / leaves the field, it is no longer applied.
• This effect refers to the target's original (printed) ATK. Multiple copies of Shrink achieve nothing.
• After the target's ATK is halved by Shrink, apply ATK changes from card effects (ex: Equip Spell Cards, Field Spell Cards).
• If the target's ATK varies due to a Continuous Effect (ex: Gren Maju Da Eiza), that monster’s ATK will be halved. If its ATK changes due to its own effect in the same turn, recalculate the effect of Shrink based on the new original ATK. When the effect of "Shrink" wears off, that monster’s ATK will be calculated as normal.
• If the target's ATK is set by its effect when it is Summoned (ex: Chimeratech Fortress Dragon), its ATK becomes 0, and remains 0 even after the effect of "Shrink" wears off.
• VS. Megamorph: If the same monster is targeted by both, the effect that resolved last is applied.