Whiscash

[BLiZzArD]

Submerge As Long as Whiscash is on your bench, prevent all damage done to Whiscash by opponents attacks

ok so does this mean if I have a Whiscash on the bench my active Whiscash can't be damaged I am aware that the self referencing rule may come into effect but if it doesn't this card is truely broken
BLiZ

[PokePop]

You answered your own question.
The self referencing rule applies.

Source: Any recent rule book.