The Cursed One

Commander creatures you own have base power
and toughness of 1/1 and are Humans in addition to
their other types. If you control three or more
Curses, they have base power and toughness of 3/3
and have, "At the beginning of your upkeep you
lose 1 life." If you control 10 or more Curses, they
have base power and toughness of 7/7, are no
longer Humans, and have, "At the beginning of
your upkeep this creature deals 2 damage to each
opponent"