Rule 813.1
Reaction is a Permissive keyword.
- 813.1.a It can be present on Cards, Rune Abilities, Legend Abilities and Permanent Abilities.
- 813.1.b Reaction grants the corresponding card or effect all abilities and permissions of Action.
- 813.1.c Reaction, additionally, is functionally short for the following:
- 813.1.d Reaction is formatted as “[Reaction]” on cards, or “[Reaction][>]” on abilities.