What are the best spells for a Fighter in Baldur's Gate 3?

In Baldur's Gate 3, Fighters are primarily known for their martial prowess, relying on weapons and armor to dominate the battlefield. However, certain subclasses and multiclassing options can introduce spellcasting capabilities to a Fighter, allowing them to enhance their combat effectiveness with magic. The most common way for a Fighter to gain access to spells is through the Eldritch Knight subclass, which is available at level 3. The Eldritch Knight is a Fighter archetype that blends martial combat with a limited selection of spells, primarily from the Abjuration and Evocation schools. This combination allows the Fighter to cast defensive spells to protect themselves and offensive spells to deal additional damage.

When building an Eldritch Knight, the first step is to choose the subclass at level 3. This grants you the ability to cast spells and learn cantrips. The Eldritch Knight uses Intelligence as their spellcasting ability, so it is important to allocate some points to Intelligence during character creation or level-up. However, since Fighters are primarily melee combatants, you should prioritize Strength or Dexterity (depending on your weapon choice) and Constitution for survivability. Intelligence should be a secondary focus, as most of your spells will not rely heavily on saving throws or spell attack rolls.

At level 3, you gain access to two cantrips and three 1st-level spells. For cantrips, consider taking utility options like Booming Blade or Green-Flame Blade, which enhance your melee attacks with additional damage. These cantrips are particularly useful because they scale with your character level, making them effective throughout the game. For 1st-level spells, Shield is a must-have. This reaction spell allows you to increase your Armor Class by 5 until the start of your next turn, making it invaluable for avoiding damage in critical moments. Another strong choice is Absorb Elements, which reduces damage from elemental attacks and allows you to deal extra damage on your next melee attack. For offensive spells, Magic Missile is a reliable option that guarantees damage, even if the target has high defenses.

As you level up, you will gain access to more spells and higher spell slots. At level 7, you gain the War Magic feature, which allows you to make a weapon attack as a bonus action after casting a cantrip. This synergizes well with Booming Blade or Green-Flame Blade, as you can cast the cantrip and then follow up with an additional attack. At level 10, you gain the Eldritch Strike feature, which imposes disadvantage on saving throws against your spells if you hit the target with a weapon attack. This makes your offensive spells more effective, especially against enemies with high saving throws.

When selecting spells, focus on those that complement your role as a frontline combatant. Abjuration spells like Shield and Absorb Elements are excellent for defense, while Evocation spells like Magic Missile and Thunderwave can provide additional damage options. Avoid spells that require high Intelligence to be effective, as your primary focus should remain on melee combat. Instead, choose spells that provide utility or enhance your survivability.

One common mistake when building an Eldritch Knight is over-investing in Intelligence at the expense of Strength or Dexterity. While Intelligence is important for spellcasting, your primary role is still that of a Fighter. You should aim for an Intelligence score of 14-16, which is sufficient for most spells. Another mistake is neglecting defensive spells in favor of offensive ones. While offensive spells can be powerful, the Eldritch Knight's strength lies in their ability to survive and adapt to different combat situations. Prioritize spells that keep you alive and allow you to continue fighting.

For advanced optimization, consider multiclassing with a full spellcasting class like Wizard. This can provide access to a wider variety of spells and higher-level spell slots, but it comes at the cost of delaying your Fighter progression. If you choose to multiclass, aim for a balance that allows you to maintain your effectiveness in melee combat while gaining additional spellcasting flexibility. For example, a 7-level dip into Wizard can grant you access to 4th-level spells, significantly enhancing your versatility.

In terms of related D&D rules, the Eldritch Knight follows the standard rules for spellcasting in Dungeons & Dragons 5th Edition. This includes preparing a limited number of spells each day, using spell slots to cast spells, and relying on Intelligence for spellcasting ability. The War Magic feature is unique to the Eldritch Knight and provides a powerful synergy between spellcasting and melee combat.

In specific scenarios, an Eldritch Knight can shine by using their spells to adapt to different challenges. For example, in a fight against a powerful spellcaster, you can use Counterspell to disrupt their magic while closing the distance to engage in melee combat. Against a group of weaker enemies, Thunderwave can clear space around you, allowing you to focus on stronger targets. In a prolonged battle, Shield and Absorb Elements can keep you alive long enough to outlast your opponents.

Overall, the best spells for a Fighter in Baldur's Gate 3 are those that enhance your combat effectiveness and survivability. By carefully selecting spells that complement your role as a frontline combatant, you can create a versatile and powerful character capable of handling a wide range of challenges.