There are two very simple reasons why this land is so valuable: it was only printed in one set, Arabian Nights, making it a part of the Reserved List, a collection of cards from Magics early days that the company has promised never to reprint
You can only activate 1 "Galaxy Trance" per turn
This happens through: Sets going out of print : When the Pokemon Company stops printing a set, sealed product and singles become scarcer over time Cards being graded : Every card sent to PSA or BGS is effectively removed from circulation, reducing available supply Cards being lost or damaged : Over decades, vintage cards are gradually destroyed through wear, water damage, and disposal Collector vaulting : When collectors buy cards to hold long-term, they remove them from the market 4
Even if you arent able to get their power to 0, their power will still be lowered significantly, enabling you to execute attacks safely
If a player would create tokens or put counters on a permanent or player while their opponents control two or more Halving Seasons, apply the replacement effects one at a time, rounding down each time