Synchronized Strike is a secret fighting art card found within the Kingdom Death: Monster Core Game.
Card Text[]
With flawless coordination, you strike as one.
When you're adjacent to a monster, attack with a melee weapon, and have an Attack Assist. Your attack gains +1 accuracy, +1 strength. Limit, once per round.
Attack Assist: A survivor who also has Synchronized Strike and is in the right spot. They are standing adjacent to the monster on its opposite side, and parallel to you.