Yore-Tiller, Genesis Tremor

No more than one land can enter the battlefield
each turn.
{x}{w}{u}{b}{r} : each opponent sacrifices {x} creatures
or planeswalkers, discards {x} cards, loses {x} life.
Each player exiles the top {x} cards of their library.
You may play {x} cards exiled this way without
paying their mana costs. Return a creature card
from a graveyard to the battlefield under your
control with a cost less or equal to the total
converted mana cost of the cards still exiled this
way. You gain {x} life.