Submerge the Land

All lands are Islands in addition to their other
types. Horrors you control can't attack.
Post Mortem: Whenever a land you control
becomes tapped, exile target card from your graveyard. (When This card's owner loses the game,
if there are at least two more players, each player gets
an emblem with "Whenever a land you control becomes tapped, exile target card from your graveyard.")