I know if this card were ever created it would end up on the forbidden list not before too long. 

Name: Overload Summon

Spell type: Normal

Effect: Special summon to the field ignoring the summoning conditions any LV5 or higher monster by discarding two divided by the level of the card to determine how many cards need to be sent to the graveyard.

Basically if you have a Level 12 card you need to discard 6 cards to summon it to the field. Kind of hard to do unless you have a card where you can draw an extra card into your hand. You get the idea, I think.

Rather a rough draft but as I said if this card were ever created it would instantly end up on the Ban List. Nonetheless an interesting idea. Could also work with Rank 4-12 if you wanted to go that way too then it would definitely be banned from the game LOL.