It works now.
However, it have some problems.
1.the effect can not work on oppoent’s turn.
(For example, this turn(3rd turn) is oppoent’s turn. He sets a card.
I should be able to see what card he sets on that turn.)
2.the effect negative itself forever when my LP is less than 3000.
(it should active itself when my LP is back to over 3000)
3.the card text is not fixed.
In DL, it is like a continuous effect.
Therefore, when I am in the condition which is LP over 3000 and turn over 3, it should always work.