Rule evolution
Rule 510.1b
Earliest archived Rules release: 2009-10-01 · 1 wording revision · 0 renumberings
Earliest archived Rules release510.1bDetails
An unblocked creature assigns its combat damage to the player or planeswalker it's attacking. If it isn't currently attacking anything (if, for example, it was attacking a planeswalker that has left the battlefield), it assigns no combat damage.
Wording changed510.1bDetails
An unblocked creature assigns its combat damage to the player, planeswalker, or
planeswalkerbattle it's attacking. If it isn't currently attacking anything (if, for example, it was attacking a planeswalker that has left the battlefield), it assigns no combat damage.