Are these Yuan-Ti’s osssra rules balanced?


I am DMing a homebrew campaign and I created an exotic island ruled by Yuan-ti. I read the Serpent Kingdoms 3rd edition manual and I tried to adapt the osssra table (page 150).

In 5th edition the condition Poisoned tries to simplify the effects of poisons, even if in DMG (pages 257-258) some different poisons and their effects are described. I was actually fascinated by the different osssras’ effect on both Yuan-ti and scaleless ones: collapsing every dangerous effect in the Poisoned condition seemed to me quite inadequate. I thus wrote the following rules.

Effect of Ossra on Yuan-ti

In order to gain the advantages given by an osssra, a Yuan–ti must inhale osssra’s smoke for at least 4 rounds, except for Hooloond. A bracer spreading osssra’s smoke covers a circular area of 20 ft. radius (as the fog cloud spell) except for Ulathlasss which covers an area of 15 ft. radius (due to its particular "heaviness").

+---------------------------+----------------------------------------------------+-----------------------+ | Osssra                    | Effect                                             | Duration              | +---------------------------+----------------------------------------------------+-----------------------+ | Mixed flaming osssra oils | Disadvantage on DEX checks and Ranged attacks      | 2d6+2 rounds          | |                           | (20 CON save, no effect on success)                |                       | +---------------------------+----------------------------------------------------+-----------------------+ | Amasstarte smoke          | Cure Wounds 4d8+8                                  |                       | +---------------------------+----------------------------------------------------+-----------------------+ | Battasss smoke            | Advantage on WIS checks, automatic success         | 10 minutes            | |                           | for Concentration spell checks after taking damage |                       | +---------------------------+----------------------------------------------------+-----------------------+ | Duthlah’hass smoke        | The yuan--ti enters in a dreamsleep state          | 4 Hours.              | |                           | (such as under the \emph{Dream} spell), in which   | Ends on damage taken. | |                           | he can retrieve memories (such as where or how     |                       | |                           | they hid something long ago, or snatches of        |                       | |                           | overheard conversation) and/or receive             |                       | |                           | messages from their deities.                       |                       | +---------------------------+----------------------------------------------------+-----------------------+ | Ektharisss smoke          | Levitate                                           | 10 Minutes            | +---------------------------+----------------------------------------------------+-----------------------+ | Faele smoke               | Advantage on CON saving throws, resistance on      | 4 Hours               | |                           | piercing, bludgeoning and slashing damage          |                       | +---------------------------+----------------------------------------------------+-----------------------+ | Hooloond smoke            | Cure Wounds 1d6+1/round while in contact           | Instantaneous,        | |                           | with the Hooloond smoke                            | max 10 rounds         | +---------------------------+----------------------------------------------------+-----------------------+ | Jalasss smoke             | Immune to Enchantment spells                       | 4 Hours               | +---------------------------+----------------------------------------------------+-----------------------+ | Laerisss smoke            | Advantage on DEX checks and ranged attacks         | 4 Hours               | +---------------------------+----------------------------------------------------+-----------------------+ | Ruusstantar smoke         | 1d12 (inhaled smoke) or 2d12 (contact with         | 4 Hours               | |                           | osssra) Temporary HP                               |                       | +---------------------------+----------------------------------------------------+-----------------------+ | Ulathlasss smoke          | Resistance to Fire and Cold damage                 | 4 Hours               | +---------------------------+----------------------------------------------------+-----------------------+ 

Effect of Ossra on Scaleless Ones

As soon as a scaleless one enters in an area where an osssra smoke is present, they have to make a Constitution saving throw (DC set by the type of osssra in the table below). The effects are active as long as the creature stands in the area covered by the smoke (see previous section for the dimension). If the creature exists the area, it must make a Constitution saving throw or suffer from the secondary effect for 1d4-1 (min. 1) more rounds.

+---------------------------+---------+------------------------------------+--------------------------------+--------+ | Osssra                    | DC(CON) | Effect on failed save              | Effect on succeeded save       | Price  | +---------------------------+---------+------------------------------------+--------------------------------+--------+ | Mixed flaming osssra oils | 20      | 3d4+3 Poison damage, Poisoned      | Disadvantage on DEX checks     | varies | |                           |         |                                    |  and Ranged attacks            |        | +---------------------------+---------+------------------------------------+--------------------------------+--------+ | Amasstarte smoke          | 13      | Paralized for 1d4+1 rounds         | Slow 1d4+1 Rounds              | 500    | +---------------------------+---------+------------------------------------+--------------------------------+--------+ | Battasss smoke            | 14      | Poisoned                           | Disadvantage on WIS checks     | 800    | +---------------------------+---------+------------------------------------+--------------------------------+--------+ | Duthlah’hass smoke        | 15      | Unconscious for 1d4+1 round        | Retching and prone.            | 1200   | +---------------------------+---------+------------------------------------+--------------------------------+--------+ | Ektharisss smoke          | 14      | Disadvantage on STR checks         | Disadvantage melee attacks     | 800    | |                           |         | and Disadvantage on melee attacks  |                                |        | +---------------------------+---------+------------------------------------+--------------------------------+--------+ | Faele smoke               | 15      | Stunned                            | Disadvantage on CON checks     | 1800   | +---------------------------+---------+------------------------------------+--------------------------------+--------+ | Hooloond smoke            | 17      | 4d6 Poison                         | Half damage                    | 1400   | +---------------------------+---------+------------------------------------+--------------------------------+--------+ | Jalasss smoke             | 13      | Disadvantage on INT and WIS checks | Disadvantage on INT checks .   | 800    | +---------------------------+---------+------------------------------------+--------------------------------+--------+ | Laerisss smoke            | 14      | 2d4 Acid damage,                   | 2d4 Acid Damage                | 300    | |                           |         | Disadvantage on DEX checks         |                                |        | +---------------------------+---------+------------------------------------+--------------------------------+--------+ | Ruusstantar smoke         | 15      | 4d4 Poison Damage                  | Half damage                    | 500    | +---------------------------+---------+------------------------------------+--------------------------------+--------+ | Ulathlasss smoke          | 16      | Paralized for 1d4+1 rounds         | Incapacitated for 1d4+1 rounds | 1800   | +---------------------------+---------+------------------------------------+--------------------------------+--------+ 

Discussion

I have the following thoughts about what I wrote.

  • I tried to follow some logical connections between the effects on Yuan-ti and on scaleless one.
  • Are the DCs balanced? Maybe they are quite low, but even in case of a successful saving throw a creature has some disadvantages, hence I thought it was a good way to create a sort of equilibrium.
  • I decided to put effects on a successful saving throw because I think that these osssras are very powerful
  • Is it ok to make the effect lasting after a creature exits the smoke cloud?
  • The cost is very similar to the table of the 3rd edition.
  • I rely on the description on Serpent Kingdoms for ingredients, visual aspects and smells of the ossras.