Text (MR): At the beginning of your upkeep, draw a card if you had no cards in hand at the beginning of this turn. If you had a card in hand, ~this~ deals 1 damage to you.
The ability always goes on the stack at the beginning of upkeep. [Mirrodin FAQ 2003/10/01]
It counts the number of cards in hand at the start of the turn, not when it resolves. [Mirrodin FAQ 2003/10/01]
