Concentration

Many powerful spells require concentration to maintain. While concentrating:

• The spell continues its effect
• You can only concentrate on ONE spell at a time
• Casting another concentration spell ends the first
• Certain events can break your concentration

Spells that require concentration say so in their description.

Examples of Concentration Spells:

• Bless
• Hold Person
• Haste
• Invisibility
• Flaming Sphere

When You Take Damage:

• Make a Constitution saving throw
• DC = 10 or half the damage taken, whichever is higher
• Success = maintain concentration
• Failure = spell ends immediately

Examples:

• Take 15 damage: DC 10 (half of 15 is 7.5, but minimum is 10)
• Take 30 damage: DC 15 (half of 30)
• Take 50 damage: DC 25 (half of 50)

Multiple Damage Sources:

• Each source requires a separate check
• Magic Missile = 3 checks (one per dart)
• One failed check = concentration lost

Automatic Concentration Loss:

• Being incapacitated or killed
• Being affected by certain conditions
• Casting another concentration spell

Conditions That Break Concentration:

• Incapacitated
• Paralyzed
• Petrified
• Stunned
• Unconscious

Voluntary End:

• You can end concentration at any time (no action required)
• Useful for switching to a different concentration spell

Constitution:

• High Con improves your saves
• Important for spellcasters who concentrate often

Proficiency:

• Sorcerer and Cleric have Con save proficiency
• Resilient (Constitution) feat adds proficiency

War Caster Feat:

• Advantage on concentration saves
• Cast spells with hands full
• Opportunity attacks can be spells

Other Helps:

• Lucky feat for rerolls
• Bless (if someone else casts it)
• Avoiding damage entirely (cover, positioning)