1. Activate or trigger the Ability — Riftbound Rules

Section 401 — 2 rules

401.1.: Add a Pending Item to the chain representing the Ability that is either being Activated or Triggered. Notably, although this Chain Item will not have a card representing it, this will create a Closed State. See rule 349. Playing Cards for more information.
401.2.: If there is currently a game effect being resolved, continue resolving the game effect instead of continuing the following steps.