These are some of the cards that can be countered by Heartless Drop Off. Seal’s effect allows it to return any Fur Hire monster from the Graveyard to the hand, while Destiny HERO - Decider’s effect can return any HERO monster back to the hand or Extra Deck.
Nope. Except for the normal spell card, that add a Mask change to hand from the graveyard.
But Decider effect(or whatever D-Hero add D-Hero from grave after normal/special summon) to add a D-Hero let you use this to against the added D-Hero.
Nice konami you give us a counter CA when you already kill them nice job.