In the rare case that one would have to use Gifts Ungiven for mana you could gifts for a Polluted Delta, Flooded Strand, Island, and Snow Covered Island.
Makes sense, but you could go for Sapphire too right?
All ways to find a basic land when theres a Chalice at 0. Great vs. decks that run Magus of the Moon. I've actually had to do this a few times in matches during GGGifts era. RIP Flame Vault, you'll always be in our hearts.