War

War is a Harbinger that can appear in all environments of Chapter 3.

Phase 1

 * Charges either left or right off-screen and continuing on from the opposite end of the screen. Continues until he has crossed the screen three times.
 * He performs this attack more often if Isaac is to his left or right.
 * Shoots eight projectiles in all directions.
 * Ascends off-screen and summons 5 Troll Bombs.
 * Returns from the side of the screen.

Phase 2
Once his health is below half, War's horse blows up, dropping War, who performs a sobbing animation. War deals a whole heart of contact damage in both phases and during his charge.
 * War charges quickly at Isaac gradually building speed and making more tighter turns.
 * Every time War loses around 1/3rd of his remaining HP in this phase he pauses briefly to sob before restarting this process.

Champion Versions

 * Dark Grey: 15% larger with 25% more HP (625). Summons 2 Mega Troll Bombs when he ascends off-screen and summons a single Troll Bomb behind his path when he charges through the screen. He also shoots 6 projectiles in all directions when he stops chasing Isaac in his second phase.

Trivia

 * War appeared in the original The Binding of Isaac.
 * War is one of the Four Horsemen of the Apocalypse mentioned in the Bible.
 * In many depictions of War, he is shown holding a sword vertically [1 ], corresponding with why War's battle sprite shows him holding his hobby-horse vertically.
 * Although his appearance on the vs screen shows his hobby-horse as brown, it is red in-game.
 * War's "horse" appears more akin to a bull.
 * In the original game, War's face was round.
 * This has been somewhat reverted in Repentance.
 * War can be seen wielding a as a weapon in one of the original game's concept arts.