Historical Rules · 1 October 2009
Rule 112.3a
Official source text from the 1 October 2009 Rules release
Spell abilities are abilities that are followed as instructions while an instant or sorcery spell is resolving. Any text on an instant or sorcery spell is a spell ability unless it's an activated ability, a triggered ability, or a static ability that fits the criteria described in rules 112.5a-j.