In anime when Yugi vs Atem, this card is called Treasure From Heaven which let both players draw cards until they have six in their hands. Atem draw 5 which make yugi's silent magician become 3500 atk.
It's always been draw until you have 6 in the anime. Atem already had a card in his hand, so he drew five. Basic math. (Baffles me when people comment on ancient posts with dumb comments.)
Anon
