Net

Nets are weapons. They are often used by water-based races, and are often set with weights, hooks, and/or barbs.

WvAC:

0 1 2 3 4 5 6 7 8 9 10
+9 +8 +7 +6 +5 +4 +3 +2 +1 0 -1

Effect

Characters attempting to use an underwater net suffer a -4 to hit unless they've both (1) taken the net as a weapon proficiency, and (2) trained in its use while underwater.3) Above-water nets suffer the regular untrained penalty for lacking the weapon proficiency.

Rules Note

There is no single ruleset for refereeing nets; there are several options provided by various monster entries and modules. Demon Idol uses the WG4 rules and this Dragonsfoot thread as inspiration, and adapts them to suit general-purpose net weapons.

1)
In written works, a DEX save is often used. However this requires DM fiat if used against the many monsters who lack DEX scores. Therefore, breath is more practical.
2)
They are rolled and count down simultaneously – a netted and trapped creature is in those states for 1-4 rounds (roll a single d4 to cover both effects), and the grand total duration of these effects will be 1-4 rounds. Do NOT roll and count them separately (e.g. do not roll d4 + d4 with a total effect of 2-8 rounds).
3)
DMG 56.