Kemna, Unspoken Horror

+1: Create 5 1/1 colorless horror creature tokens with "At the beginning of your upkeep sacrifice this creature."
-3: Destroy target land, then create a 3/3 colorless horror creature token for each land in target opponent's graveyard.
-7: Each opponent discards their hand, you draw a card and lose 1 life for every two cards discarded this way.