Every player has certain cards that are fondly remembered, whether because its a card that captured their imagination when they first discovered the game (Eron the Relentless and Killer Bees for me), was part of a deck you loved to play (Rishadan Port in Legacy Lands for me), or any other numerous sentimental reasons
The ability to sacrifice it to tutor any other land in a player's deck is certainly powerful, though an effective 4 mana (3 + tapping Urza's Cave) to activate is a steep cost in a format as potentially fast as Modern
As head designer, I'm more focused on things that impacted gameplay, and I'm primarily looking at randomized booster sets
To start with, make any purchase or buy any event entry (including store-run online events), and you can receive the Reliquary Tower (limit one per customer, while supplies last)
Perfect for Commander, cEDH & Beyond Teferis Protection is one of the most sought-after cards in Commander and cEDH
And as long as you have any three creatures with different powers when the trigger tries to resolve (even if it's three other entirely different creatures, or the same creatures but with a different set of powers), then it will resolve