Effect
Discard 1 monster, then target 1 face-up monster on the field; it loses ATK equal to the discarded monster's original ATK.
This effect targets 1 face-up monster in either player's Monster Zone.
When activating this effect, you must discard 1 monster from your hand as a cost. (You cannot discard a monster with 0 or "?" ATK to activate this effect.)
If you activate "Stratagem" during the Damage Step, it must be activated from the start of the Damage Step up to before damage calculation.
The ATK reduction from the effect of "Stratagem" is applied as long as the targeted monster remains face-up in the Monster Zone.
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