From Compendium of Worldly Lore
Bladesingers are elves who have blended art, swordplay, and arcane magic into a harmonious whole. In battle, a bladesinger’s lithe movements and subtle tactics are beautiful, belying their deadly martial efficiency.
Multiclass fighter/wizards are the most obvious candidates for the prestige class, although any elf who can wield a martial weapon and cast arcane spells can become a bladesinger. Bladesinger ranger/wizards, rogue/wizards, and even bards are not unknown.
Bladesingers command great respect in most elf communities, and bladesingers usually serve as itinerant guardians and champions of the elf community at large.
Role: Spell DPS
Characteristics: Martial wizards that gain bonuses to fighting in combat and abilities to cast in melee safely
Source: Complete Warrior
Game Rule Information
The Bladsinger has the following game statistics.
Abilities: You need to have your casting stat obviously, probably best to be intelligence, and you need Strength and Dexterity for martial combat
Alignment: Any
Hit Die: d8
Starting Gold: N/A
Class Skills
The Bladsinger's class skills are Balance (Dex), Concentration (Con), Jump (Str), Knowledge (arcana) (Int), Listen (Wis), Perform (Cha), Search (Int), Spellcraft (Int), Spot (Wis) and Tumble (Dex)
Skill Points at 1st Level: (2 + Int modifier) × 4
Skill Points at Each Additional Level: 2 + Int modifier
Class Features
All of the following are class features of the Bladsinger.
Weapon and Armor Proficiency: A Bladsinger is proficient with light armor but not shields
Spells per Day: At every odd-numbered level gained in the bladesinger class, the character gains new spells per day as if she had also gained a level in an arcane spellcasting class she belonged to before adding the prestige class. She does not, however, gain any other benefit a character of that class would have gained, except for an increased effective level of spellcasting. If a character had more than one arcane spellcasting class before becoming a bladesinger, she must decide to which class she adds the new level for purposes of determining spells per day.
Bladesong Style Ex: When wielding a longsword or rapier in one hand (and nothing in the other), a bladesinger gains a dodge bonus to Armor Class equal to his class level, up to a maximum of her Intelligence bonus. If the bladesinger wears medium or heavy armor, she loses all benefits of the bladesong style.
Lesser Spellsong Ex: When wielding a longsword or rapier in one hand (and nothing in the other), a bladesinger of 2nd level or higher can take 10 when making a Concentration check to cast defensively.
Song of Celerity Ex: Once per day, a bladesinger of 4th level or higher may quicken a single spell of up to 2nd level, as if she had used the Quicken Spell feat, but without any adjustment to the spell’s effective level or casting time. She may only use this ability when wielding a longsword or rapier in one hand (and nothing in the other). At 8th level and higher, she can quicken a single spell of up to 4th level.
Greater Spellsong Ex: A bladesinger of 6th level or higher ignores arcane spell failure chances when wearing light armor.
Song of Fury Ex: When a 10th-level bladesinger makes a full attack with a longsword or rapier in one hand (and nothing in the other), she can make one extra attack in a round at her highest base attack bonus, but this attack and each other attack made in that round take a –2 penalty. This penalty applies for 1 round, so it also affects attacks of opportunity the bladesinger might make before her next action.