Prophet is the boss that you encounter in the ruins at the very beginning of the game. The enemy always takes the fourth position (unless you can destroy the wooden barricades that he builds before the battle) and the first three positions are taken up by Fractured Pews, which do not attack, but they guard your access to the boss. Destroying it, apart from allowing you to deal damage to the Prophet more easily, also rewards you with a cash injection, towards the end of the battle (1250 gold pieces per each one that you smash).
During the battle, the boss can (and will) perform several actions per turn. To a major extent, these are harmless attacks that deal scanty damage, they boost stress level a little and they can impose the Blight effect. What is most dangerous is the combination of two attacks - Calamitous Prognostication and Rubble of Ruin. The former marks a position within your party and the latter (which the boss performs in the following turn), crumbles tons of rubble onto the marked character. This combination is repeated every turn and there is nothing that you an do about it - this is not regular Mark, that can be lifted, so you need to get ready to take the blow (see below to learn more).
The boss's attacks
1-2 part members
202% / 210% / 222,5%
Marks the character to be attacked
Rubble of Ruin
The marked targets
82,5% / 90% / 102,5%
11-23 / 15-29 / 22-43 damage and removes the mark
Your entire party
82,5% / 90% / 102,5%
1 / 1-2 / 1-3, 100% / 120% / 140% chances of Blight
Eye on You
Your entire party
92,5% / 100% / 112,5%
1 / 1-2 / 1-3 damage, chances of stunning, stress
The above table presents all of the boss's attacks - values separated with the "/" symbol provide effects depending on levels (1, 3 and 5), at which you are going to fight this opponent.
The boss's statistics
Resistance to Stun
Resistance to Blight
Resistance to Bleed
Resistance to Debuff
Resistance to Move
The above table presents the boss's statistics in all three difficulty variants.
How to defeat the boss
Fighting this boss is a typical example of an "fight of enfeeblement" - there is no specific tactic against this boss. Simply put, the one who kills the opponent first, wins the battle. It is in your interest to keep your character alive, so there actually are two ways to defeat the boss - with the help of the party that quickly deals lots of damage, or with the party that weakens the opponent's attacks.
In the first case, the make-up of the party should be as follows:
Man-at-Arms - he may not be the strongest character in the game, when it comes to dealing damage, but thanks to his Defender, you can protect the marked unit (he will then take the damage himself). Without being healed, the Man-at-Arms should be able to withstand several such attacks.
Vestal - she has only one job here, which is keeping the party alive (and especially the Man-At-Arms) .
Hellion - while on the first position, she can attack the boss with the powerful Iron Swan tat deals huge damage. Just remember not to destroy the blockades in such case, because this attack can target the 4th position only.
Arbalest - with the Sniper Shot, she can deal tremendous damage, especially if you can mark the enemy first (e.g. with the Sniper's Mark).
With a party this big you need to concentrate the attacks of the Hellion and the Arbalest on the boss, as Man-at-Arms take in the damage dealt by the boss and use the Vestal as the healer, in order to replenish the Man-at-Arms's health.
The alternative make-up concentrates on draining the boss's health and it consists of:
Vestal - at the first, or the second position, she is capable of attacking with Hand of Light that decreases damage dealt by the enemy for several turns. This effect can be stacked. The only problem is that you can use it only against targets in the first two rows and this requires you to destroy two of the opponent's barricades.
Occultist - his Weakening Curse is, as a matter of fact, a stronger version of the Hand of Light. Additionally, he can use this ability to attack any opponent in from any position in your party.
Two remaining positions do not make that much difference - after you stack several attacks on the boss, you will drive down damage dealt by him by 100% and he will no longer pose a threat.
After several turns, the boss will pose no threat to you and you will be able to weaken him, bit by bit - just remember to keep stacking effects that weaken his attacks.