Rule evolution
Rule 506.4c
Earliest archived Rules release: 2009-10-01 · 1 wording revision · 0 renumberings
Earliest archived Rules release506.4cDetails
If a creature is attacking a planeswalker, removing that planeswalker from combat doesn't remove that creature from combat. It continues to be an attacking creature, although it is attacking neither a player nor a planeswalker. It may be blocked. If it is unblocked, it will deal no combat damage.
Wording changed506.4cDetails
If a creature is attacking a planeswalker or battle, removing that planeswalker or battle from combat doesn't remove that creature from combat. It continues to be an attacking creature, although it is not attacking
neitheranyaplayer,norplaneswalker,aorplaneswalkerbattle. It may be blocked. If it is unblocked, it will deal no combat damage.