154. When a spell is successfully played, a player executes the rules text of the spell. This is called Resolving the spell.

154.1. Spells have their rules text executed from top to bottom when they are Resolved.

154.2. If a later part of a spell applies a Replacement Effect that alters earlier parts of the spell, apply those replacement effects as appropriate. Example: A spell says "Choose a unit. Kill it the next time it takes damage this turn." and "[Legion] — Kill it now instead. (Get the effect if you've played another card this turn.) " If the Legion condition is satisfied, the unit is killed immediately and the instruction to kill it the next time it takes damage is ignored, even if the unit remains on the board somehow.

154.3. While a spell or ability on the chain is Resolving , no other spells or abilities can be finalized on the chain or resolved, including triggered abilities or game effects that would occur as a result of the execution of the spell.

154.3.a. Finish resolving all effects of a spell before addressing anything the spell may have triggered or caused through execution.