Unless some effect explicitly says otherwise, a creature that can’t attack you can still attack a planeswalker you control.
2014-02-01 • wotc
If you life total was above 5 at end of turn, then you lose life to make your total 5. If it was less than 5, you gain life to bring it to 5.
2004-10-04 • wotc
It sets your life total at the beginning of the end step of every player’s turn, not just your own.
2004-10-04 • wotc