Thanduriel's Thunder

The end times are upon us. 

The Shade of the God of Death has achieved one of their many goals, and has summoned a Blight on the world.

• For every 3 rounds of combat in anywhere that could be considered "outside", everyone who cant be said to have some affiliation with Thanduriel or their eviller sides has a chance to be hit by lightning. This is determined by rolling a d20. On an 17+ , they are hit for 10d6  Thunder Damage. On a Nat20, they take an extra 25 Thunder Damage.
• All Natural Water Sources become slowly poisonous over time, with a stack on effect. The first time the water is drunk, roll a d4. You take that much poison damage. If someone takes the full amount 3 times in a row, they immediately keel over, and begin taking death saving throws.
• Plants will start to die, as the sky turns ashy black, and the sun turns blood red. Crops will wither, and animals will slowly turn hostile.  
• Every Chicken and Parrot in the world grows to be 3 times in size, and gains the ability to use a thunderbolt spell once. Doing so makes them explode into fathers and die.

This spell is dispelled once either the God who this spell is linked to is killed, the right card is drawn from a magical card deck, or a successful wish spell.

This spell can be learned, and is usually found in the tomes of the highest ranking acolyte of the bad guys.