Goldknight Castigator + double damage

Xagrum

In double damage events, if you have Goldknight Castigator on the board when the event switches to double damage any creature can kill you with one hit.

in this event it happened to me. Got hit by a 3/3 creature while at full health and was immediately dropped to zero life.

Abenjes

do you mean gold night castigator gets killed with one hit?

this is what I've seen, the card just keeps receiving the damage until its destroyed.