Historical Rules · 23 April 2010
Rule 606.5
Official source text from the 23 April 2010 Rules release
A loyalty ability with a negative loyalty cost can't be activated unless the permanent has at least that many loyalty counters on it.
Historical Rules · 23 April 2010
Official source text from the 23 April 2010 Rules release
A loyalty ability with a negative loyalty cost can't be activated unless the permanent has at least that many loyalty counters on it.