Detect Evil and Good — Complete D&D 5e Spell Guide

Table of Contents

• •Quick Answer
• •Overview
• •Stat Block
• •When NOT to Use
• •Comparisons
• •Spell Slot Efficiency
• •Pro Tips
• •Common Mistakes
• •Usage Tips
• •Synergies
• •FAQ

Overview

Hey, new caster—Detect Evil and Good is one of those spells that sounds amazing on paper but sits on the bench most campaigns. As a 15-year vet, I've seen it clutch in undead crypts or fiend-infested hellscapes, but it's a trap pick 80% of the time because it doesn't detect 'evil' alignments (biggest misplay ever), only specific creature types like aberrations, celestials, elementals, fey, fiends, or undead within 30 feet—and their exact locations. It also flags consecrated or desecrated objects/places, penetrating barriers unless blocked by stone/metal/wood/dirt. Slot economy? At 1st level with concentration up to 10 minutes, it's cheap but ties up your action economy poorly against Bless or Healing Word. Opportunity cost is huge for clerics/paladins who need slots for combat. Verdict: Situational trash-tier staple—prep only if your DM loves themed monsters; otherwise, Detect Magic laps it. We'll break down combos like prepping Turn Undead sweeps, anti-patterns like combat casting, and head-to-heads showing why rituals rule utility.

Stat Block

When NOT to Use This

• •DM rolls random encounters without fiends/undead—90% whiff.
• •Party has Devil's Sight or Truesight covering invis/illusions.
• •Need item ID—Detect Magic ritual free, no conc.
• •Anti-magic zones or wild magic surges.
• •Exploration with high passive Perception (16+) spotting clues.

Spell Slot Efficiency

When worth the slot: Undead/fiend themed dungeon (e.g., 5+ encounters).

When NOT worth the slot: Mixed monster random tables or magic-trap heavy.

Pro Tips (Veteran Secrets)

Tip #1: Prep for one-shots or arcs with undead/fiends—swap out post-arc for Shield of Faith.

Why veterans know this: Campaigns telegraph themes; 15 years taught me slots are finite, niche > general.

This avoids the mistake of: Forgetting concentration drop on damage—vets track via notes.

Tip #2: Use while mounted as paladin for mobile scouting in patrols.

Why veterans know this: 30 ft self bubble covers horse + rider; reveals ambushes early.

This avoids the mistake of: Standing still—vets circle to map all hits.

Tip #3: Detect desecrated ground before resting—avoids undead rising under tent.

Why veterans know this: Long rests heal 100%, but surprise ghouls TPK level 3 parties.

Common Mistakes to Avoid

Expecting alignment detection on villains.

Why it's bad: RAW creature types only—wastes slot on kings/knights, false negative.

Do this instead: Zone of Truth or Insight DC 15 for morality.

Casting mid-fight for 'that shadow'.

Why it's bad: Concentration + action lost = party eats 14 DPR from ghosts unmitigated.

Do this instead: Pre-cast outside, burst in with locations known.

Ignoring consecrate/desecrate on objects.

Why it's bad: Misses plot hooks like cursed swords (desecrated).

Do this instead: Sweep gear piles post-battle for holy relics.

Usage Tips

• •Cast proactively before entering rooms in haunted mansions or demon lairs to reveal hidden ghosts or imps without risking Perception checks. This saves surprise rounds and lets you position for AoE like Sacred Flame. Follow up immediately with targeted spells.
• •Use on suspicious altars/statues in temples to detect desecration, avoiding traps or alerting to cult rituals. It's self-only, so frontline casters shine here. Combine with Insight for full intel.
• •In urban intrigue with fey courts, sweep noble manors for disguised archfey—30 ft radius covers a room. Pinpointing lets rogues Sneak Attack precisely. Avoid if party has passive Perception 15+.

Rules Notes

• •RAW, it detects presence and location of qualifying creatures/objects/places—no number specified if multiple, but most tables rule you sense all within range.
• •Does NOT detect alignment, good/evil people, or constructs/oozes—strictly aberration/celestial/elemental/fey/fiend/undead + consecrate/desecrate.
• •Penetration blocked by 1 ft stone, 1 in common metal, thin lead sheet, 3 ft wood/dirt—great vs thin walls, useless vs stone dungeons.
• •No save; automatic if target qualifies. Concentration means no overlapping with Faerie Fire or Spiritual Weapon.
• •Paladins get it at level 5; clerics earlier—neither ritual, so slot tax hurts.

Synergies

• •Pairs perfectly with Turn Undead/Destroy Undead for clerics—detect, then channel divinity for multi-kills averaging 10+ skeletons cleared.
• •Synergizes with Protection from Evil and Good: detect fiend, then buff party for advantage on saves vs charm/frighten.
• •Zone of Truth follow-up: detect celestial spy, then force truthful interrogation without Insight contests.

Anti-Patterns

• •Never cast in active combat—1 action to reveal a ghost behind you wastes your turn when Fireball or Hold Person averages 28 DPR. Enemies act first anyway.
• •Skip if DM homebrews lots of humanoids/monstrosities—80% encounters ignore it, burning your only 1st-slot.
• •Don't upcast (no higher level effect)—wastes higher slots when Fireball at 3rd does 28 damage vs this's zero.

Tactical Modules

• •Undead Sweeper — When to use: Entering tombs or graveyards with necrotic vibes—before kicking doors.. Synergy: Locate zombies/ghouls, then Channel Divinity: Turn Undead hits CR 0-5 packs for 20+ DPR cleanup.
• •Fiend Hunter — When to use: Demon cults or Abyss portals—scout summoning circles pre-ritual.. Synergy: Pinpoint imp spies, Banishment sends them home (DC 13 CHA save, 50% fail rate on CR 1).
• •Fey Intrigue Detector — When to use: Enchanted forests or feywild crossovers—check glades for pixies.. Synergy: Reveal dryad groves, cast Dispel Magic on illusions for surprise advantage.

Countermeasures

• •Threat: Lead-lined coffin hiding vampire spawn. — Response: Switch to Detect Magic for aura or physical crowbar/Mage Hand probe.. Fallback: Retreat and bait with noise, ambush on emergence.
• •Threat: Stone-walled dungeon (1 ft blocks spell). — Response: Position at cracks/doors for partial overlap, use Stone Shape to breach.. Fallback: Rely on passive Perception 14+ and Scent attacks from ranger.
• •Threat: Multiple overlapping creatures (RAW ambiguity). — Response: Move slowly, triangulate by changing position.. Fallback: Call for DM ruling or use Faerie Fire for visual confirm.

Frequently Asked Questions

is detect evil and good good 5e

Situational at best. It's clutch for undead/fiend hunts in themed campaigns but wastes slots in general play—Detect Magic is the go-to utility. Prep only if your adventure has 3+ relevant encounters.

detect evil and good vs detect magic 5e

Detect Magic wins for versatility (auras, schools, rituals no slot/conc)—use it 90% of time. This edges out only for pinpointing undead/fey locations without item clutter. Both 1st-level, but ritual makes Magic always available.

does detect evil and good detect alignment 5e

No—strictly aberration/celestial/elemental/fey/fiend/undead + consecrate/desecrate. No moral/alignment detection since 5e dropped that. Use Zone of Truth for evil NPCs.

can you twin detect evil and good 5e

No, self-range isn't a creature target—Twinned Spell requires one creature. Even if, conc prevents multiples. Stick to single caster scouting.

detect evil and good ritual 5e

No, not a ritual despite utility—must burn a slot. Paladins/cleric multiclass hurts more. Use Detect Magic as ritual instead.

does detect evil and good work underwater 5e

Yes, no material component or environmental block mentioned—penetrates barriers same as land. Great for aboleth lairs or sahuagin temples with elementals.

best cleric subclass for detect evil and good 5e

Grave Domain—synergizes with Channel Divinity vs undead, Eyes of the Grave (cantrip version). Light Domain secondary for fiend blasting. Skip Knowledge.

detect evil and good multiple creatures 5e

RAW ambiguous ('the creature' singular), but tables rule you sense all locations/presences. Ask DM pre-cast; move to confirm.

Citations: api:spells/detect-evil-and-good

Includes SRD content per CC BY 4.0. Source: dnd5eapi.co.