Shining Sword Attack
Shining Sword Attack is Trunks' sword technique. It is the only strike attack that needs a weapon: you can only use it while holding the Brave Sword.
Learning it
Trunks teaches Shining Sword Attack for 9,000 TP. He has no alignment requirement. You also need Ki Control and at least 5% Power Release, and the technique must be equipped in a technique slot.
How it works
Hold the Brave Sword in your main hand and press the technique's slot key. As with every strike attack, it picks a target in front of you (your lock-on target first, then the last enemy you hit, otherwise the one closest to your crosshair) within a 6-block cone, or 12 blocks while flying, and you appear right in front of it. Its damage is your Strike Damage × 2.4.
If nothing is in range you rush forward for up to 2 seconds, or straight at your locked-on target, and strike the first enemy you reach; missing completely refunds 40% of the Ki and halves the cooldown. Rushing at an enemy that is rushing at you starts a strike clash. Every strike attack also starts a short shared cooldown (3 seconds by default).
Upgrades
Like every strike attack, it gains experience when it hits, which you can spend on damage and cooldown (−2.5% per level, up to −50%). See Strike Attacks.