Oversized (5e Variant Rule)

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Oversized Weapons

Rationale

A weapon with the oversized property is an intermediate step between the weapons in the PHB and Large-sized weapons (DMG p. 278). The intent is that can be used by Large-sized player characters instead of a Large-sized weapon, so they can deal the expected extra damage without being overpowered.

Oversized Weapons

The oversized property can be applied to the statistics of any weapon.

An oversized weapon deals one-step greater damage than its normal counterpart.

  • 1 to 1d3 → 1d4 → 1d6 → 1d8 → 1d10 → 1d12 → 2d8
  • 2d4 → 2d6 → 2d8
Other properties
  • Light. The weapon is only considered light if you are a Large creature, otherwise it is ignored.
  • Finesse. The weapon is only considered finesse if you are a Large creature, otherwise it is ignored.
  • Versatile. The weapon is only considered versatile if you are a Large creature, otherwise it is considered to be a two-handed weapon.
  • Heavy. If you are a Medium creature, you have disadvantage on attack rolls with the weapon. If you are Small, you cannot wield the weapon at all.
  • Thrown. You can only throw the weapon if you are Large.
  • Two-handed. Add the heavy property if it did not already have it.
Weight and Cost

Double the weight and cost of the weapon, and of any ammunition it uses.

Oversized unarmed strike?

Yes, works as above; a Large creature deals 1d4 bludgeoning damage with an unarmed strike.

What about Large weapons?

Large weapons deal double the damage dice (e.g. a Large shortsword deals 2d6 damage). Note that this rule is buried away in the "Creating a Monster" chapter of the DMG, and not the PHB. This rule is a guide to help a DM create monsters, so the DM should not feel obligated to allow the same rule to apply to PCs. Nonetheless, a DM might allow a PC to wield a Large weapon as-is; or allow them to wield it with disadvantage on attack rolls (as though it were Heavy for them).

Examples

Greatspear
  • An oversized spear costs 2 gp and weighs 6 lb.
    • When wielded by a Large creature: 1d8 piercing, thrown (20/60), versatile (1d10)
    • When wielded by a Small or Medium creature: 1d8 piercing, two-handed
Buster Sword, or Fullblade
  • An oversized greatsword costs 100 gp and weighs 12 lb.
    • When wielded by a Large creature: 2d8 slashing, heavy, two-handed
    • When wielded by a Medium creature: 2d8 slashing, heavy, two-handed; disadvantage on attack rolls
    • A small creature cannot wield this.
Guan Do
  • An oversized glaive costs 40 gp and weighs 12 lb.
    • When wielded by a Large creature: 1d12 slashing, heavy, reach, two-handed
    • When wielded by a Medium Creature: 1d12 slashing, heavy, reach, two-handed; disadvantage on attack rolls
    • A small creature cannot wield this.
Mini Ballista
  • An oversized heavy crossbow costs 100 gp and weighs 36 lb.
    • When wielded by a Large creature: 1d12 piercing, ammunition (range 100/400), heavy, loading, two-handed
    • When wielded by a Medium creature: 1d12 piercing, ammunition (range 100/400), heavy, loading, two-handed; disadvantage on attack rolls
    • A small creature cannot wield this.
Nodachi, or Ōdachi
  • An oversized katana costs 40 gp and weighs 6 lb.
    • When wielded by a Large creature: 1d10 slashing, versatile (1d12); finesse while wielded in one hand
    • When wielded by a Small or Medium creature: 1d10 slashing, two-handed
Oversized Dagger
  • An oversized dagger costs 4 gp and weighs 2 lb.
    • When wielded by a Large creature: 1d6 piercing, finesse, light, thrown (range 20/60)
    • When wielded by a Small or Medium creature: 1d6 piercing
Oversized Longbow
  • An oversized longbow costs 100 gp and weighs 4 lb.
    • When wielded by a Large creature: 1d10 piercing, ammunition (range 150/600), heavy, two-handed
    • When wielded by a Medium creature: 1d10 piercing, ammunition (range 150/600), heavy, two-handed; disadvantage on attack rolls
    • A small creature cannot wield this.

Legacy Oversized Weapons

These were made before I changed the rules, so they need going through.

Oversized Weapons Cost Damage Weight Properties

Other Examples

Examples of such weapons include:

  • Guan Yu's guan dao[1]
  • Pier Gerlofs Donia's two-handed sword[2]
  • Dragonslayer[3] from the anime/manga Berserk
  • Final Fantasy's Buster Sword [4]
  • Monster Hunter's greatswords [5]

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