Historical Rules · 27 September 2013
Rule 606.5
Official source text from the 27 September 2013 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 · 27 September 2013
Official source text from the 27 September 2013 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.