This is limited by the cards that work in this ramp payoff + sacrifice artifact space, but there are definitely some like Bristlebud Farmer, Goldvein Hydra, Ancient Adamantoise, and Im sure others
Time Walk has such a simple effect, yet its so cheap and powerful that it would give its user an overwhelming advantage, especially if they were able to use multiple versions in their deck
It can also protect its attackers with effects like Boros Charm, and on defense, cards like Teferi's Protection ensure the Kaalia player doesn't lose to a counterattack
Helms Deep, owing to the huge, climactic battle that takes place there, is what most people think of when they think of The Two Towers, so the card that depicts it in Tales of Middle-earth had some sizable shoes to fill