The big exceptions are Enchanted treatments, scarce promos, and breakout staples that are essential for a top deck
White aggro strategies are usually less viable in formats with multiple opponents and a higher starting life total, but Delney enables a steady stream of value to keep boards wide and attacks frequent, and given their synergy with the recently printed Hare Apparent, brewers are sure to build decks around Delney for years to come
This might make it sound like multiple Battle for Bretagards are worse than a single Battle mixed with other cards, but thats not really true either
The version of this card with a rarity of HR ended up being the pick of its four original versions from Miracle Twin [SM11]
Keeping this in mind, $64 is still a hefty price for any card, so consider your use-cases before chasing this card too hard
On the other hand, a high cmc deck that wants to win on turns 10+ will want a higher land count so you can consistently hit your land drops on turns 5+