Killer Card (Is it overpowered or balanced?)

[Raptorslayer]

Here is the card. Enjoy or weap for mercy at its wrath!!

[img]http://img641.imageshack.us/img641/7492/161300q.jpg[/img]

Lore:
1 DARK Tuner monster + 1 or more Fiend-Type non-Tuner monsters
Once per turn discard 1 monster card from your hand and inflict damage to your opponent equal to the level of the discarded monster multiplied by 100. If you don't this card is removed from play. (This card can only be Summoned once per duel.)

Please vote and respond.
Points will be rewarded for best reponse.