Target 2 face-up monsters on the field; halve the ATK of 1 monster, and if you do, add that lost ATK to the other monster. These effects last until the end of this turn.
Rulings
Netrep Rulings
"Riryoku" has two targeting aspects.
"Riryoku" will resolve without effect if either of its targets is "Gradius's Option."
Spell|
Normal