Abilities » Force Canceler | Attacks » Ten-Card Return GX
If I have Celesteela GX with "Force Canceler" Ability active, what happens if my opponent uses Venomoth GX's "Ten-Card Return GX" attack?
The damage portion gets blocked, but your opponent still gets to shuffle their hand into their deck and draw 10 cards because that part is not being done to YOUR Pokemon.
Source: Unbroken Bonds FAQ (2019-04-19), TPCi Rules Team (2019-05-09)
Attacks » Ten-Card Return GX
Can I use Venomoth GX's "Ten-Card Return GX" attack if I have no cards in my hand?
Yes, but you must shuffle your deck before drawing cards.
Source: Unbroken Bonds FAQ (2019-04-19), TPCi Rules Team (2019-05-02)