Ultimate Time Stop v1.8.4 (Forge 1.21.1)

The biggest 1.21.1 update yet: Time Prediction, Combat Slow Motion and Self Acceleration arrive on 1.21.1, plus optional TaCZ gun support. Everything below is new since v1.6.1.

Multiplayer: the server and every player need this version (1.8.3 also works with 1.8.4). Older versions can't join.

What's New

1. Time Prediction (Netherite and Creative watches)

• Slows the world around you and shows what is about to happen: glowing paths for mobs and projectiles, see-through "future" silhouettes and landing rings.
• See enemy shots before they are fired, potion areas, incoming explosions and where an Enderman is about to teleport.
• Right-click a slowed arrow to catch it, or hit it to send it back.

2. Two new watch variants

• Combat Slow Motion (on the Slow Motion card): slows mobs and every projectile while players, blocks and the server keep normal speed.
• Self Acceleration (on the Fast Forward card): speeds up only you. Walking, falling, mining, placing, eating, attack recharge, cooldowns, effects, hunger, healing, breath, burning and freezing all run at the Fast Forward speed.
• Switch with the World · Combat / World · Self labels on the cards, or press the new B key without opening the watch.

3. TaCZ guns (optional)

• Bullets freeze, slow down, get redirected and ricochet with the time modes and runes, plus Chrono Coins (+RICOSHOT) and Dead Eye.
• Tested with TACZ 1.21.1 by MUKSC (1.1.6-hotfix-r1).

4. Creative Watch, rewind and settings

• Rune matrix: switch all 15 runes on the Creative Watch on or off individually, or all at once.
• Radius editor: pick a bubble size from 1 to 512 blocks.
• Rewind Self toggle: with Self: OFF you keep your position, health and items while the world rewinds. Server owners can block this with /timestop rewind allowexempt false.
• Casual acceleration and Swim in stopped time settings (H menu → Visuals & FX).
• Deceleration Field now slows only projectiles; everything else keeps normal speed.
• /timestop redirect look and the Vector rune now send projectiles exactly where your crosshair points.
• New J key opens the watch screen.

Fixes

• Rune of the Tachyon: the 3x mining speed in Slow Motion and Matrix now works.
• Your settings stay yours: joining a server no longer overwrites your own speed and swimming settings.
• Fixed a crash with mods that rewrite chunk random ticking (such as Lithium on other loaders).
• Rendering mods that replace cloud rendering can no longer stop the game from starting.

Requirements

• Minecraft: 1.21.1
• Minecraft Forge: 52.1.16 or higher
• Java: 21
• Optional: TACZ 1.21.1 by MUKSC (1.1.6-hotfix-r1)
• Sable and Curios integrations are available on the NeoForge and Fabric versions only.