The Rotting Seers

Mutate 1 (If this creature would untap during your untap step, you may instead put one +1/+1 counter on it.)
You have no maximum hand size.
Whenever one or more +1/+1 counters are placed on a creature you control, you draw X cards and lose X life, where X is the number of +1/+1 counters placed on that creature.