Double Attack

Edison Card Text
Discard 1 Monster Card from your hand to the GY. Select 1 monster on your side of the field with a lower Level than the discarded monster. The selected monster can attack twice this turn.
Targets
No Damage Step effect
Banlist • Unlimited
Rulings
edisonformat.net
●Discarding a monster for “Double Attack” is a cost. This effect targets.
●If you use “Cost Down” so that your “Blue-Eyes White Dragon” in your hand is Level 6, then you can't discard it to activate “Double Attack” and target your Level 7 “Dark Magician” on the field.
●If you use “Double Attack” on a monster such as “Twinheaded Beast” it still only gets two attacks, not three.
●You can't discard a Level 1 monster for “Double Attack”.
edisonformat.com
Discarding a monster for “Double Attack” is a cost. This effect targets.
If you use “Cost Down” so that your “Blue-Eyes White Dragon” in your hand is Level 6, then you cannot discard it to activate “Double Attack” and target your Level 7 “Dark Magician” on the field.
If you use “Double Attack” on a monster such as “Twinheaded Beast” it still only gets two attacks, not three.
You cannot discard a Level 1 monster for “Double Attack”.