155. Certain Keywords on spells are not executable rules text, but instead intrinsic properties of the spell.

155.1. These determine inherent properties and behaviors of the spell before being played or while on the chain.

155.2. These keywords are:

155.2.a. Action
155.2.a.1. This indicates that, in addition to being able to be played during an Open State , this spell may also be played during Open States during Showdowns.
155.2.b. Reaction
155.2.b.1. Grants all cases and rules of Action.
155.2.b.2. In addition to all prior cases, may also be played during all forms of Closed State.
155.2.b.3. This will result in this spell resolving before spells and abilities that are already on the chain.