Meren of Clan Nel Toth

Whenever another creature you control dies, you
get an experience counter. At the beginning of
your end step, choose target creature card in your
graveyard. If that card's mana value is less than or
equal to the number of experience counters you
have, return it to the battlefield. Otherwise, put
it into your hand.
I dreamt for so long. My flesh was dull gold...and
my blood, rotted. Corpse after corpse, left in my
wake... As I awaited... his return.