After seeing some videos, I now really wish there was an Attack on Titan mod.
It would allow for the *super rare* spawning of Titans, as well as large walls of Carved Sandstone(the one with the creeper on it). Titans cannot break this kind of Sandstone. Titans become immobile and invincible at night, and awaken at day. they can only be killed by striking a hitbox on there neck . They break most blocks they run into. They have 20 health, and look like massive, ape-like Steves. Drop a stack of Bone and a stack of Rotten Flesh, as well as a enchantment book or some diamonds.
3D Manuver Gear: Crafted using Diamonds and hardened clay of the matching color. It is equiped as pants. If you click G while wearing the gear, it will shoot a grappeling hook in the direction your pointing at. It stores spare Sharpened Swords
Sharpened Swords: Placing an iron sword and two flint on the crafting table creates one of these. They have abysmal durability(15), but deal 10 damage.
Colossal: A massive skin-less Titan. It has 90 health. It CAN break Carved Sandstone. Drops the Titan Slayers Seal, giving Health Boost II for 50 seconds.