Historical Rules · 1 May 2011
Rule 702.80b
Official source text from the 1 May 2011 Rules release
A creature "attacks alone" if it's the only creature declared as an attacker in a given combat phase. See rule 506.5.
Historical Rules · 1 May 2011
Official source text from the 1 May 2011 Rules release
A creature "attacks alone" if it's the only creature declared as an attacker in a given combat phase. See rule 506.5.