Lesser Magic Blades
Extrapolating a bit from this old article I found while looking for something else. I used Everything's generator for the names. The way you can spend charges on multiple things is based on Ktrey's wand and staff table.
...
Lesser magic blades only count as enchanted while charged. Spending a charge takes a whole round. Once the charges run out the sword becomes mundane.
HACK FIRE CHIEF
+0 Longsword, 6 charges. As long as this has charges, the weilder takes half damage from fire. Spend a charge to become a +1 longsword of flame for 1 turn, +3 vs Trolls or Treants. Spend 1 charge to shoot a ray of flames 30' long dealing 2d6 damage.
INCUBATE BUCKLE GRIND
+0 Broadsword, 32 charges. Spend n^2 charges in order to make the enchantment +n for 1 turn (eg, spend 25 charges for a +5 enchantment. The sword's grandeur changes to suit its enchantment.
MACHINE OF ART
+0 Shortsword, 12 charges. Spend a charge to become a +1 sword of paralyzation for 1 turn. All hit targets must save vs paralyzation or be stunned in place for 1d6 rounds. Spend a charge to force a stunned target to save vs petrification or become a marble statue.
FREEZE ANGEL FEED
+0 Broadsword, 18 charges. Spend a charge to become a +1 broadsword of fear for 1 turn. The wielder appears as a terrifying angelic being to all within 20'. Allies never test morale, enemies must test morale every round or flee. Spend a charge to grant 1d6+1HP to a target within 20'.
JAVALIN RANGER KOSMOS
+0 Longsword, 6 charges. As long as this has charges, its chromed blade reflects the night sky even while inside or during the day. Spend a charge to turn this into a +1 longsword of returning for 1 turn. Can be thrown up to 30' and called to hand with a whistle from twice that distance.
RAW BLADE GROUP
+0 Greatsword, 1 charge. Its hilt is heavy and hard enough to function as a blacksmith's hammer. Spend a charge to animate every blade crafted using this sword to fight alongside this one. After 1d6 rounds of combat, 1d20 swords arrive from elsewhere. Animated Sword: HD 2 (HD 4 to-hit), AC as Plate+1, Attack as Sword+1, Flying
...
Reading: Arm of the Sphynx by Josiah Bancroft
Watching: Babylon 5, Season 1