Grove of the Burnwillows

In Commander, Grove of the Burnwillows is a straight upgrade over any tapped dual in red-green decks — the life-gain clause punishes nobody in a 40-life multiplayer game. In Legacy and Vintage it sees fringe play as a pain-free dual in specific Punishing Fire loops, where the opponent gaining life is actually the mechanism that recurs the spell, turning the downside into an engine. Modern dropped Punishing Fire itself from the format years ago, so the land lost its primary home there and exists mainly as a budget-adjacent untapped dual. Oathbreaker follows the same logic as Commander — if your signature spell is red-green, there's no reason to play a tapped land instead.