Against mono-colored decks this can actually be a killer. White weenie becomes a lot more powerful with this on the board. It can swing a game in your favor late in the game when your board position is already set up and you just need that few extra power to deplete your opponent's life. It's a card that has found its way into more than a few mono-white EDH deck lists. It could still be quite relevant as a Legacy sideboard option today (if white weenie strategies were still a Legacy-viable deck).