Deadlier than Arsenic

Deadlier than Arsenic is a level 4 evocation spell. It is a variant of Kereska's Favour that allows its caster to imbue themselves with the power of poison and unlock resistances and spells associated with it. It is granted by Markoheshkir.

Description

Embrace Kereska's poison to gain resistance to ⁠Poison damage. Your poison spells deal additional ⁠Poison damage equal to your proficiency bonus.

When you deal spell damage, inflict 2 turns^{[See Notes]} of  Poisoned upon the target. While attuned to Kereska's poison you can cast  Cloudkill and  Ray of Sickness once each per short rest.

 Cloudkill ()

Cast as a level 5 spell ( Recharge: Short rest.)

 Ray of Sickness ()

Cast as a level 5 spell ( Recharge: Short rest.)

Properties

Cost

 Action

Details

 Range: Self

 Recharge: Short rest

At higher levels

Casting this spell at a higher level grants no additional benefit.

Condition: Vessel for Kereska's Poison

 Vessel for Kereska's Poison

Duration: Until Long rest

• Affected entity has resistance to Poison damage.
• Its poison spells deal additional damage equal to its proficiency bonus.
• When it deals spell damage, it inflicts 2 turns of  Poisoned upon the target.
• While attuned to Kereska's poison, it can cast  Cloudkill and  Ray of Sickness at 5th level once per short rest.

How to learn

Granted by items:

•  Markoheshkir

This spell is a variation of:
 Kereska's Favour

Notes

• The in-game tooltip says this effect inflicts Poisoned for 1 turn, but it actually inflicts it for 2 turns.
• Applying Poisoned can only occur once per attack. A spell hitting multiple targets like  Cloudkill will only apply the condition to a single target.
• The version of  Ray of Sickness granted by this spell matches the damage of a level 5 upcasted version (6d8⁠⁠Poison), but it only counts as a level 1 spell.