Arc sweep

Three questions for the mechanic

• Is the signal specific?

  Show the pivot, start angle, direction, and moment the rotation becomes fixed.

• Is the response reachable?

  Measure the nearest safe route from both close and distant positions.

• Is the opening useful?

  Keep the boss committed long enough for the player to reposition and act.

Design mistakes

• Hidden rule

  If the signal does not reveal the pivot and arc, the hit feels arbitrary.

• Wrong scale

  If timing is tested only at one upgrade level, the pattern can become trivial or unavoidable.

Tune the attack

• Match visuals and collision

  The visible threat must match the active hitbox in space and time.

• Start with ordinary abilities

  Keep one response available with abilities the player already has.

• Retest upgrades

  Check movement, range, damage, and invulnerability against every phase.

Arena

• Make the arena support the rule

  Use enough clear floor to read the arc edge; remove props that hide the pivot.

Player upgrades

• Respect player upgrades

  Test the strongest available build. If an attack is blocked, make the immunity clear and preserve another useful response.

Do not confuse this with

• Name the exact pattern

  A sweep rotates an edge around a pivot. A spin is centered on the boss; a beam may keep tracking.