402. Ready

402.1. Readying is an action that marks a non-spell Game Object as available for action.

402.1.a. To mark it, rotate the card 90 degrees opposite of Exhausting , so that it is vertically oriented in front of you.
402.1.b. A Unit that is already Ready cannot be Readied again.
402.1.c. If a Unit is instructed to be Readied while it is already Ready , nothing additional happens.

402.2. "Ready" is a state for Game Objects that other game effects and rules can reference.

402.3. This is a Limited Action.

402.3.a. A player Readies all non-spell Game Objects they Control during the Ready Step of the Beginning Phase on their turn.
402.3.b. The player may also Ready their Game Objects when effects or spells instruct them to do so.