Historical Rules · 17 June 2011
Rule 606.5
Official source text from the 17 June 2011 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 · 17 June 2011
Official source text from the 17 June 2011 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.