Radiological Siege & Corrosion Protocol

Your study of radiation allows you to precisely destabilize matter—collapsing structures and corroding metal through controlled atomic decay.

Siege Casting (Intelligence)

When you cast a spell that deals acid, necrotic, poison, or radiant damage, you can designate it as a Siege Spell.

• The spell deals double damage to objects and structures
• This benefit applies only to:
• Unattended objects
• Constructs and nonliving structures
• You can use this feature a number of times equal to your proficiency bonus per long rest

Corrosive Radiation

Your magic mimics the degrading effects of extreme radiation on metal.

When you deal damage to a creature with a Siege Spell, you can force one nonmagical metal item it is wearing or holding to begin corroding.

• The creature makes a Dexterity saving throw
  (DC = 8 + your proficiency bonus + your Intelligence modifier)
• On a failure:
• The item takes a –1 cumulative penalty:
• Weapons: –1 to damage rolls
• Armor/Shield: –1 to AC provided
• If the penalty reaches:
• –3 → the item is destroyed or rendered useless
• On a success:
• No effect

Accelerated Decay

If a target is already affected by your Corrosive Radiation:

• Your next Siege Spell against that target deals extra damage equal to your Intelligence modifier
• And the target has disadvantage on the saving throw against further corrosion effects

Controlled Exposure

You can exclude a number of creatures up to your Intelligence modifier from being affected by your Siege Spells.