Unless stated otherwise, everything here is Diablo II: Resurrected build 3.3.93847, Reign of the Warlock.
Unless stated otherwise, everything here is Diablo II: Resurrected build 3.3.93847, Reign of the Warlock.

Warns of impending danger and improves the defense rating of you and your party.
Shout is a Barbarian Warcry (level 6, requires Howl, unlocks Battle Orders). For 6 mana it gives the Barbarian and every ally within 12 2/3 yards a percentage of defense, +100% at level 1 and +290% at level 20, for 30 seconds at level 1 and 220 at level 20. Two numbers decide it: the defense step of 10% a level, and the duration synergy, 5 seconds for every hard point in Battle Orders and Battle Command, which is why a Barbarian with both maxed gets a Shout that lasts minutes.
| Level | Duration | Defense: + |
|---|---|---|
| 1 | 30 seconds | 100% |
| 2 | 40 seconds | 110% |
| 3 | 50 seconds | 120% |
| 4 | 60 seconds | 130% |
| 5 | 70 seconds | 140% |
| 6 | 80 seconds | 150% |
| 7 | 90 seconds | 160% |
| 8 | 100 seconds | 170% |
| 9 | 110 seconds | 180% |
| 10 | 120 seconds | 190% |
| 11 | 130 seconds | 200% |
| 12 | 140 seconds | 210% |
| 13 | 150 seconds | 220% |
| 14 | 160 seconds | 230% |
| 15 | 170 seconds | 240% |
| 16 | 180 seconds | 250% |
| 17 | 190 seconds | 260% |
| 18 | 200 seconds | 270% |
| 19 | 210 seconds | 280% |
| 20 | 220 seconds | 290% |
| 21 | 230 seconds | 300% |
| 22 | 240 seconds | 310% |
| 23 | 250 seconds | 320% |
| 24 | 260 seconds | 330% |
| 25 | 270 seconds | 340% |
| 26 | 280 seconds | 350% |
| 27 | 290 seconds | 360% |
| 28 | 300 seconds | 370% |
| 29 | 310 seconds | 380% |
| 30 | 320 seconds | 390% |
Mana is 6 at every level (mana 6, lvlmana 0). The defense bonus is skills.txt Param1 (100, "Armor % baseline") plus Param2 (10, "Armor % per level") a level, applied through skill_armor_percent: +100% at level 1, +140% at level 5, +190% at level 10, +240% at level 15, +290% at level 20, +390% at level 30. The Basin's page writes it as 90 + (10 × slvl). The duration is Param3 (750 frames) plus Param4 (250 frames) a level at 25 frames a second, 30 seconds at level 1 and 10 more a level, 220 at level 20, 320 at level 30; the Basin's page keeps the original game's 20 + 10 a level beside Resurrected's 30 + 10, and the table confirms the 30. On top of that the row's auralencalc adds Param8 (125 frames, 5 seconds) for every hard point in Battle Orders and Battle Command: 20 in each is +200 seconds. The radius is fixed at 12 2/3 yards (19 sub-tiles × 2/3) and does not change with level. Defense and base duration read lvl, so +skills count; the duration synergy reads blvl, hard points only.
duration in seconds = 30 + 10 × (Shout level − 1) + 5 × (Battle Orders hard points + Battle Command hard points)
The Basin's page gives the shape: the buff is carried by missiles from the Barbarian's position and lands on the caster and every allied player, mercenary and pet within the 12 2/3-yard area; gaps open between the missiles as they travel but are not normally wide enough to miss a target. The percentage multiplies the receiver's own defense, the same stat Enhanced Defense on armour and Iron Skin raise, and feeds an attacker's hit roll, see Defense Rating and Chance to Hit. It is a cast and uses cast rate. It does not stack with itself: the Basin's page says the last Shout cast is the one applied, so a higher-level Shout is overwritten by a lower-level one cast later.
A lower-level Shout from a party member overwrites yours; the game keeps the last cast, not the best.
Shout and Iron Skin are separate percentages of the same defense, each added as its own line. Running still sets hit checks aside, so Shout, like all defense, pays only while you walk or stand. The Basin's page notes that Madawc, the Ancient, casts Shout.
Shout's two synergy lines are both duration: +5 seconds per hard point in Battle Orders and +5 seconds per hard point in Battle Command (the dsc3 lines, Param8 ÷ 25). It gives the same back: its own hard points add 5 seconds to each of Battle Orders and Battle Command, so the three Warcries lengthen each other and a Barbarian who maxes two of them has long buffs in all three. All three synergies read blvl. Shout's defense and base duration read lvl, so a +skill from an item is worth a hard point to the buff itself (+10% defense, +10 seconds) but adds nothing to the other two Warcries' duration. The Basin's page says +1–3 Shout can spawn on a primal helm of item level 12 or higher.
Shout never touches a player; it raises only the defense of the Barbarian and the allies in range, and that defense is what another player's attack rating is rolled against. There is nothing for the player-versus-player damage rule to cut, see Player versus Player.
Written from the game's tables (build 3.3.93847) and the cited pages; a per-level table is computed from skills.txt and skilldesc.txt by the same evaluator the skill pages use. A “legacy rule” is a published engine rule no table proves; a “game table” is read from the table named. · Report incorrect data