The hoop stands upright facing +Z on two canted arms rising from a turned plinth, so the player runs through it rather than over it. The gold hoop, its violet inner band and the eight rune blocks are one ring node and the crystal core another. The pulse clip grows the hoop in its own plane by seven per cent and swells and lifts the core; the ring centre sits 0.31 m clear of the arms, so the growth never drives the hoop into them. Bounding size 1.21 by 1.46 by 0.72 m; metres, +Y up, +Z forward. Origin: ground contact at y=0, centred on the footprint, because a respawn marker is installed on the floor and stands on its plinth. Clips: pulse (2.0 s). Rigid node animation only: named nodes with translation, rotation and scale clips, no skinned rig and no skeleton. No collision volumes and no navigation data. Opaque materials throughout; the pack uses no alpha blending and no transmission.