Mine Piece: New Era 1.66.0 (Forge 1.20.1)

- Added Giant Grab Slam to Onigashima Luffy and Elbaph Luffy while in Gear 5.
- Luffy grows to five times his normal size, grabs one enemy, lifts them overhead and throws them into the floor.
- A single terrain-only explosion forms a crater at the landing point. The captured enemy receives one physical hit.
- Damage is tuned toward 40 health against Four Emperors Shanks: native armor/Resistance/Haki calculations give approximately 39.52 for Onigashima and 41.50 for Elbaph. Native guards, cancellations and other combat modifiers still apply.
- Luffy shrinks back to normal size after the slam. The move then has a 15-second (300-tick) cooldown.
- Growth, collision dimensions, eye height, render layers and the gripping hand follow the same synchronized timeline.
- Interrupted, removed or reloaded entities release the captured target and restore their previous gravity/size state.
- The move does not overlap Kraken Gatling. Previous Gear 4 removals and earlier combat/model fixes are retained.

Validation: compiled and checked native bindings against MinePiece 14 and 15; automated controller, cleanup, cooldown, damage-formula and previous combat regressions; actual GeckoLib model baking and merged callback execution; headless OpenGL previews.
No live Minecraft client playtest or FPS benchmark was performed.
