Fought lvl50 today he destroyed my vassal on my last turn with a trap card that i have never seen, the figure of the card was some kind of explosion, looks like this card is not listed here.
R u sure it wasn't widespread ruin? Just run 1 Antimagic-Arrows, using it on ur last turns battle phase prevents him from using widespread ruin or any other trap he might run and which isn't listed (as long as he uses that card during ur battle phase).