Historical Rules · 27 March 2015
Rule 506.3
Official source text from the 27 March 2015 Rules release
Only a creature can attack or block. Only a player or a planeswalker can be attacked.
Historical Rules · 27 March 2015
Official source text from the 27 March 2015 Rules release
Only a creature can attack or block. Only a player or a planeswalker can be attacked.