The new Radiant Jirachi from Silver Tempest has one of the nastiest ability and attack combos I have seen. The only downside is it is weak in terms of HP and you can only run one since it is a Radiant Pokemon. But have no fear, the deck is built around these weaknesses. The first thing to mention is that this deck runs Hisuian Goodra, whose ability Metal Lodging, protects Jirachi from Pokemon V.
Trainer cards are crucial to the magic of this deck. Glimwood Tangle helps you to get more consistent knockouts with Jirachi. Rescue Stretcher, Metal Saucer, Escape Rope, and Switch are the cards you’ll want to grab when Jirachi gets knocked out so you can start attacking ASAP. I run Diancie to buy time in case I don’t start with Jirachi or if I need an extra turn to get setup after Jirachi is knocked out.