Type: black-and-white medieval combat storyboard sheet
Prompt: Create a {argument name="headline text" default="16-panel medieval duel storyboard"} as a clean 4x4 grid of sixteen numbered panels showing a complete fight sequence between two consistent fantasy characters: a {argument name="hero type" default="lean armored warrior with a longsword and cape"} and a {argument name="opponent type" default="massive gatekeeper with a double-headed battle axe"}. Render everything in detailed grayscale on a white background like a combat instruction sheet or cinematic storyboard. Keep the same side-view orientation and character proportions throughout, with motion arrows in every panel that clarify movement and weapon paths. Use these exact panel titles and captions: 1 Standoff, 2 Gatekeeper Advances, 3 Overhead Swing, 4 Steel Clash, 5 Warrior Sidestep, 6 Low Slash, 7 Gatekeeper Reels, 8 Warrior Presses In, 9 Axe Block Attempt, 10 Sword Deflect, 11 Feint High, 12 Body Slip, 13 Thrust to the Heart, 14 Impact, 15 Gatekeeper Falls, 16 Aftermath. Include the exact explanatory caption sentence under each title as described in the layout. Panel 14 should be a slightly closer shot showing the sword piercing the chest with a visible blood burst. The final result should feel like a printable action-planning sheet for animating a duel, with consistent characters, readable action silhouettes, and a clear beginning, escalation, decisive strike, and ending.