Modified Warhead

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[Passive]
Increase Magical Attack Power and Max MP. Strengthens and sharpens cannonball attacks.
(Scare Chase, Aceldama, Aiming Shot, Impact Detonation (A), Artillery Strike - Missile Shower, Dread Chase, Siege Shelling, Mobile Shelling, Magnum Shot, Chaos Cannon, Carpet Bombing (A), Fatal Cannon (A), Cannon Prison, Kinetic Bombardment)
All skill's physical damage will be converted to magical damage.

Requirements

Class	Level Required
Shelling Guardian	15

Skill Level	Required Level	Magical Attack Increase	Max MP Increase	Cannonball Enhancement
Skill Level	Required Level	Magical Attack Increase	Max MP Increase	Damage Increase	Knockdown Decrease
PvE
1	15	9%	100 MP	17%	1
2	31	11%		19%
3	39	13%		21%
4	83	15%		23%
PvP
1	15	3.6%	100 MP	8.5%	1
2	31	4.4%		9.5%
3	39	5.2%		10.5%
4	83	6%		11.5%

The listed skills only gain damage on specifically their cannonball-related damage. If they have additional hits involving the Destroyer itself, such as the melee range hit on Scare Chase and Impact Detonation, or the attack from Siege Shelling, that will not have its damage increased.
Unlike other knockdown reduction passives that decrease the knockdown given by your attacks, Modified Warhead causes the attacks it affects to lower the foe's knockdown value.

Date		Changes
KR	NA	PvE	PvP
02/09/2012	05/01/2013	Modified Warhead added.
11/07/2013	02/12/2014	▲ MP gain from Siege Shelling/Mobile Shelling added.
07/10/2014	-	▲ Attack bonus slightly increased. ▲ Affects active skills.
02/05/2015	-	▼ Damage Increase decreased. ▼ Knockdown Reduction decreased. ▼ MP gain per shot decreased.
10/29/2015	03/16/2016	▼ Knockdown Reduction decreased. ▼ MP gain per shot decreased.
08/11/2016	09/28/2016	Fixed issue where MP gain per shot effect not working.
11/02/2017	11/15/2017	▼ MP Gain per shot removed.
02/08/2018	03/07/2018	Kinetic Bombardment added to the list of strengthened cannonball attacks.
08/01/2019	08/28/2019	▲ Cannonball Attack Damage Increase increased. ▲ Added an effect that changes all physical skills to magical skills. ▲ Max MP Increase effect added. ▼ Knockdown Reduction decreased.
08/14/2019	08/28/2019	▼ Cannonball Attack Damage Increase decreased. ▼ Knockdown Reduction decreased.
12/23/2021	01/12/2022	▲ Magical Attack Increase effect added. ▼ Cannonball Attack Damage Increase decreased.
03/17/2022	04/13/2022	▲ Magical Attack Increase increased.
06/22/2023	07/19/2023	None	▼ Cannonball Command/Skill Damage Increase decreased.
11/09/2023	12/06/2023	▲ Magic Attack Increase increased. ▲ Cannonball Enhancement Damage increased.

Server	Name	Translation
South Korea	변환 된 탄두	Converted Warhead
Japan	弾頭改造	Modified Warhead
China (Simplified Chinese)	弹头改造	Modified Warhead
Germany	Modifizierter Sprengkopf	Modified Warhead
Spain	Explosivo modificado	Modified Explosive
France	Tête explosive modifiée	Modified Warhead
Italy	Testata Esplosiva Modificata	Modified Warhead
Poland	Zmodyfikowana Głowica	Modified Warhead
Brazil	Ogiva Aperfeiçoada	Enhanced Cannonball