Bloody-All-Hallow’s-Eve

All non-basic lands are mountains and swamps.

When Bloody-All-Hallow’s-Eve enters, put four
scream counters on it. At the end of each turn
remove a scream counter from it.

If there are no scream counters on
Bloody-All-Hallow’s-Eve during your upkeep,
sacrifice it and each player returns all creature
cards from their graveyard to the battlefield.