bans.kv

bans.kv controls which ability combinations are forbidden and which abilities are excluded from mechanics like Multicast or Spell Echo. Most banned pairings are now handled by ReduxBans flags set directly on the ability data, but bans.kv covers structural rules that cannot be expressed as a simple per-ability flag.

Top-Level Blocks

Block	Purpose
`BannedTowerCombinations`	Pairs of tower abilities that cannot coexist on the same tower.
`Categories`	Named groups of spells used as reusable references inside `BannedGroups`.
`BannedGroups`	Numbered groups where no two abilities from the same group can be selected together.
`BannedTowerGroups`	Same concept as `BannedGroups`, but for tower abilities.
`noMulticast`	Abilities that are explicitly excluded from Ogre Magi Multicast triggering.
`noSpellEcho`	Abilities that Spell Echo will never echo.
`noWitchcraft`	Abilities that will not have their cooldowns lowered by the Witchcraft cooldown-reduction patch.

Categories

Categories define reusable spell groups that can be referenced inside other groups using value "2" (as opposed to "1" which references a single spell).

"Categories"
{
    "SpammableSpells"
    {
        // Include the ToggleSpells list by reference
        "ToggleSpells"                      "2"

        // Individual spammable abilities
        "abaddon_aphotic_shield"            "1"
        "abaddon_death_coil"                "1"
        "antimage_blink"                    "1"
        "bristleback_quill_spray"           "1"
        ...
    }

    "ToggleSpells"
    {
        "pudge_rot"                         "1"  // toggle
        "leshrac_pulse_nova"                "1"  // toggle and low cd
        "morph_agi_int_redux"               "1"  // toggle
        "medusa_split_shot"                 "1"  // toggle
        ...
    }
}

Do not create recursive category references. The ban system has no cycle detection — a category that references itself (directly or indirectly) will loop indefinitely.

BannedGroups

Numbered groups list abilities that are mutually exclusive — a player cannot hold more than one ability from the same group.

"BannedGroups"
{
    // One-hit combo group
    "1"
    {
        "brewmaster_drunken_brawler"        "1"
        "earthshaker_enchant_totem"         "1"
        "kunkka_tidebringer"                "1"
        "monkey_king_boundless_strike"      "1"
        "ursa_overpower"                    "1"
        "weaver_geminate_attack"            "1"
        ...
    }

    // Mega range group
    "2"
    {
        "dragon_knight_elder_dragon_form"   "1"
        "sniper_take_aim"                   "1"
        "templar_assassin_psi_blades"       "1"
        "terrorblade_metamorphosis"         "1"
        "winter_wyvern_arctic_burn"         "1"
    }

    // Bash group
    "3"
    {
        "faceless_void_time_lock"           "1"
        "slardar_bash"                      "1"
        "spirit_breaker_greater_bash"       "1"
        ...
    }

    // Cooldown manipulation group
    "5"
    {
        "tinker_rearm"                      "1"
        "death_prophet_witchcraft"          "1"
        "keeper_of_the_light_chakra_magic"  "1"
        "master_magic"                      "1"
        ...
    }
}

ReduxBans Flags vs. bans.kv Entries

Redux uses two complementary systems for banning ability combinations:

System	Where	How	Typical Use
ReduxBans flags	On the ability’s KV data block (`npc_abilities_custom.txt` or override files)	A `ReduxBans` key lists ability names that this ability cannot be combined with	Simple pairwise “troll combo” bans between two specific abilities
bans.kv entries	In `bans.kv` under `BannedGroups` or `Categories`	Groups of 3+ mutually exclusive abilities, or category-level rules	Complex group bans, mechanic exclusions (multicast, spell echo), spammable-spell enforcement

ReduxBans example (in ability data)

"lifebreak_redux"
{
    ...
    "ReduxBans"
    {
        "spectre_dispersion"    "1"
    }
}

This bans only the specific pair lifebreak_redux + spectre_dispersion.

bans.kv example (group ban)

Group 1 (the one-hit combo group) bans any combination of crit/attack-multiplier abilities. Adding a new ability to this group automatically makes it mutually exclusive with every other ability already in the group — no per-pair entries are needed.

noMulticast and noSpellEcho

These lists prevent the Ogre Magi Multicast and Spell Echo mechanics from triggering on abilities that would behave incorrectly when cast multiple times:

"noMulticast"
{
    "arc_warden_tempest_double"          "1"  // bugs out
    "alchemist_unstable_concoction_throw" "1" // wastes multicast cd
    "morphling_replicate"               "1"  // bugs out
    ...
}

"noSpellEcho"
{
    "arc_warden_tempest_double"          "1"
    "antimage_blink"                     "1"
    "furion_teleportation"               "1"
    ...
}

noWitchcraft

Abilities listed here will not have their cooldowns lowered by the Witchcraft cooldown-reduction patch applied globally by Redux:

"noWitchcraft"
{
    "chi_strike"    "1"
}

Scripting

Data Files

Server API

Changelog

Top-Level Blocks

Categories

BannedGroups

ReduxBans Flags vs. bans.kv Entries

ReduxBans example (in ability data)

bans.kv example (group ban)

noMulticast and noSpellEcho

noWitchcraft

​Top-Level Blocks

​Categories

​BannedGroups

​ReduxBans Flags vs. bans.kv Entries

​ReduxBans example (in ability data)

​bans.kv example (group ban)

​noMulticast and noSpellEcho

​noWitchcraft

Top-Level Blocks

Categories

BannedGroups

ReduxBans Flags vs. bans.kv Entries

ReduxBans example (in ability data)

bans.kv example (group ban)

noMulticast and noSpellEcho

noWitchcraft