Strongest Sword is Gilgamesh's EX Burst, where eight swords circle in front of him. The player has to select Excalibur, which is the red sword. If the player selects correctly, Gilgamesh attacks the opponent five times, then ends the EX Burst with Ultimate Illusion, where he leaps into the air and slams his sword down, creating a shock wave that deals HP damage. If the player selects Excalipoor, it will deal Bravery damage of 1 with Gilgamesh looking at the sword, realizing it is not Excalibur, and throwing it away, landing it onto the opponent dealing HP damage.
Mightiest of Swords is an active ability that has the user attack a single target with the mightiest of swords for 4 AP. It can be used by Gilgamesh.