Ultra Rare: Two foil stars
At the beginning of combat on your turn, if you control five or more Deserts, create that many 1/1 red, green, and white Sand Warrior creature tokens
Whether the advantage is giving you two types of mana (like the A/B/U and Revised DUAL LANDS) or an ability to untap an attacking target creature like MAZE OF ITH from The Dark, these types of cards can turn a simple deck into something powerful and fun to play
I can tell you I lost a tight game to Temur in the Swiss (game but not match) to not having the Dragon, despite having double-digit Dragons in my deck and sideboard
While the rarity of the card is likely one of the main reasons for collectors mad dash, it also plays into the larger cultural phenomenon surrounding The Lord of the Rings
It provides a top-end enchantment that will buff your whole board for as long as it sticks around, and the knight you can make with its Adventure ensures you don't risk missing your two-drop by including it
