Rule · Chapter 5
cr:5.1.1
To play a card is to move it to the stack as a card-layer.[1.6.2a] Only a card’s owner can play it unless otherwise specified by a rule or effect. Playing a card involves the following steps in order: Announce, Declare Costs, Declare Modes and Targets, Check Legal Play, Calculate Asset-Costs, Pay Asset-Costs, Calculate Effect-Costs, Pay Effect-Costs, and Play.