The Drengir

At the beginning of your end each player
sacrifices a creature and mills 2 cards. For each land
that's put into the graveyard this way, both you and
that land's owner may search their library for a
basic land card and put it onto the battlefield
under their control.

Whenever a nonland permanent is put into a
graveyard from anywhere, put a +1/+1 counter on
The Drengir and each player loses 1 life.