Shield 5e: The Best 1st-Level Spell in the Game

Shield is a 1st-level reaction spell that adds +5 AC until your next turn. It's broken. It's been top-tier for 50 years. Every class that can cast it, should.

The Spell

• Level: 1
• Casting Time: 1 reaction, when you're hit by an attack or targeted by Magic Missile
• Range: Self
• Components: V, S
• Duration: 1 round
• Classes: Sorcerer, Wizard

Effect

You gain +5 AC, including against the triggering attack. You also take no damage from Magic Missile.

Why It's So Good

+5 AC for a single round is massive.

An attacker with +8 to hit rolls 1d20+8. Against AC 15, they need 7+ to hit (70% chance). Against AC 20, they need 12+ (45% chance).

A 25% reduction in hit chance for a single reaction is huge. Over the round, you might dodge 1-2 attacks that would have otherwise connected.

When to Cast Shield

Cast Shield when:

1. An attack is about to hit you. The attack is announced. The AC total is known. You can see it would hit.
2. A Magic Missile is targeting you. Shield negates Magic Missile damage entirely.

Don't cast Shield when:

• The attack is low-damage. Don't burn a 1st-level slot on a 3-damage goblin attack.
• You have no spell slots remaining of any level. Shield doesn't help if it bankrupts you.
• The attack would miss anyway. +5 AC can't turn a hit into a miss if the roll is already below your AC.

Shield + Mage Armor

Mage Armor gives you AC 13 + Dex mod for 8 hours. Shield gives +5 for a round.

A Wizard with Mage Armor + 16 Dex has AC 16. Shield brings them to AC 21 for a round. That's plate-armor-plus territory.

Shield + Uncanny Dodge

If you're multi-classed or otherwise stacking defenses, Shield combined with Uncanny Dodge (Rogue level 5) means:

• Attack hits you normally.
• Shield activates: might miss now.
• If still hits, Uncanny Dodge halves damage.

Reaction Economy

Shield uses your reaction. One reaction per round.

Competing reactions:

• Counterspell. More powerful but slot-hungrier.
• Opportunity Attack. Not a concern for Wizards who don't threaten melee.
• Hellish Rebuke (Tiefling racial). Niche.

Shield is almost always worth the reaction. Enemy casters are rare. Your own attacks are bigger.

Who Has Shield

• Wizard. Yes. Include in spellbook.
• Sorcerer. Yes. Know this spell.
• Warlock. No (but Hexblade via non-SRD can get it).
• Bard (Magical Secrets). Can pick it up.
• Eldritch Knight (Wizard subset). Yes!
• Arcane Trickster. Yes!

If your class can have Shield, it should have Shield.

Feats for Shield Access

• Magic Initiate (Wizard/Sorcerer). Get one 1st-level spell (could be Shield). Note: you can only cast it once per long rest via Magic Initiate unless you can spend slots, which Magic Initiate doesn't enable.
• Fey Touched, Shadow Touched. Access to specific spells depending on flavor.

Most non-caster classes don't have good feat routes to Shield.

Multiclass for Shield

Multiclassing into Wizard (1 level) or Sorcerer (1 level) grants Shield access. Popular multiclasses:

• Paladin / Sorcerer. Cha-based, get Shield, Haste, etc.
• Fighter (Eldritch Knight). Intrinsic Shield access at level 3.
• Rogue (Arcane Trickster). Wizard spells at level 3.

A level 2 Wizard dip is one of the strongest multiclass options in the game, almost entirely because of Shield.

In Solo Play

Shield is essential solo:

• Reduces damage input dramatically.
• Reactive, not proactive. You see the hit coming before using slot.
• 1st-level slot cost. Cheap insurance.

A solo character with Shield is significantly more durable than one without.

The Endlessness and Shield

Our AI Dungeon Master handles Shield's reaction timing: when an attack hits, you're prompted "Do you want to cast Shield?" If yes, +5 AC applies to that attack and all attacks until your next turn. Magic Missile immunity also applies if triggered.

For related reads, our armor class guide, spell slots guide, and wizard guide cover more.

Final Takeaway

Shield is the single best 1st-level spell in D&D. If your class has it, learn it, prepare it, cast it often.

Start a Wizard or Sorcerer on The Endlessness and keep Shield ready for every fight.