Thirst for More

Cumulative upkeep - Pay 1 life and 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.)
Whenever you cast a spell or discard a card, put
an age counter on Thirst for More.
When you sacrifice Thirst for More, you lose life equal to the number of age counters that were on it.