Historical Rules · 23 August 2019
Rule 702.6d
Official source text from the 23 August 2019 Rules release
An “equip [quality] creature” ability is an equip ability, and an “equip [quality] creature” cost is an equip cost. Any effect that modifies how or whether a player may activate an equip ability of an object affects “equip [quality] creature” abilities of that object. Any effect that increases or reduces an equip cost will increase or reduce a “equip [quality] creature” cost.