Does not work well since a few cards that can send cards to graveyard are available in current card pool. To decrease Life Points to 0 by only the effect of this card, you need to send at least 14 cards.
In normal YGO game where players start with 8K LP, this card is not significant. But in Duel Link, it's really helpful. It's funny when Sylvan players keep sending their cards to the graveyard. Also great against "Spellbook" players.
Would this damage stack when there are 2 or 3 of these on the field? I can imagine it becoming usefull if that is the case because all cards sent to the graveyard are affected by this card (including spell, trap and fusion sommoned cards)