The Dead Forest God

At the beginning of your upkeep, lose 4 life.

{t}: Target land becomes a Forest or Swamp.

{ut}: each opponent chooses Swamp or Forest, then
loses 1 life for each permanent they control with that
name.

Discard four cards: each opponent gains life for each
card in their graveyard, then you gain life equal to
the life gained in this way.