So whilst The Ringhart Crest is a card you would never put in your deck on its own, with its restrictions on how you use its mana making it a touch worse than previous variants of this style of card, there is precedent for such a card being worth your time and mana in Standard
"Chishiro," he heard, faintly, his name spoken in urgent whisper
Theres a clear synergy that flows through all of the cards that support this tribe, which makes it so easy to build a powerful deck around them
One ancillary cardeach booster will contain one card from a Theros Beyond Death ancillary release, including Planeswalker Decks, Theme Boosters, and the Buy-a-Box promo
A foil is fairly rare and seeing it on a rare or mythic is even more so
Magic the Gathering's creators made the card incredibly rare to counteract its strength