Survivor of the Unseen

Text:

Cumulative upkeep (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.)
: Draw two cards, then put a card from your hand on top of your library.

Rulings:

• 7/15/2006 If you don’t draw a card because all the draws were replaced (with dredge, for example), you still have to put a card from your hand on top of your library.
• 10/1/2008 Paying cumulative upkeep is always optional. If it’s not paid, the permanent with cumulative upkeep is sacrificed. Partial payments of the total cumulative upkeep cost can’t be made. For example, if a permanent with “cumulative upkeep <img src="/Handlers/Image.ashx?size=small&amp;name=1&amp;type=symbol" alt="1" align="absbottom" />” has three age counters on it when its cumulative upkeep ability triggers, it gets another age counter and then its controller chooses to either pay <img src="/Handlers/Image.ashx?size=small&amp;name=4&amp;type=symbol" alt="4" align="absbottom" /> or sacrifice the permanent.