Shaker

Shaker is an instant death attack used by Boomer in Super Mario RPG: Legend of the Seven Stars. The attack can only be performed by Boomer in the game. When using this attack, Boomer will deliver a powerful strike to Mario or one of Mario's allies with his katana, automatically downing the selected party member. This attack can be completely nullified by wearing a Jinx Belt or a Quartz Charm. The attacked party member can also press "A" at the right moment to deflect the attack; a perfectly timed block will completely nullify the damage, while a block delivered a little too early or a little too late will leave the hero with only one HP (but prevent them from being downed).