Relentless Deer

If an opponent has five or fewer lands,
whenever an opponent plays a land,
Relentless Deer becomes a 0/4 Deer creature
until end of turn.
If you control 3 or more Relentless Deer,
Relentless Deer becomes a 2/4 Deer creature. Whenever you sacrifice a food, you may pay {g}{g}.
If you do, create a token that's a copy of this enchantment except the token isn't legendary.