draw as many as you want, and only if you want.

Cumulative upkeep—Draw a card. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) At the beginning of your end step, sacrifice a land and discard your hand.

If you would draw a card, you may skip that draw instead.

You have no maximum hand size. If an effect causes you to discard a card, discard it, but you may put it on top of your library instead of into your graveyard.

You may play lands from your graveyard.