I have enough detail from the official Wizards announcement to write an accurate summary.

SUMMARY:
Wizards of the Coast has revealed the full decklist for its upcoming Magic: The Gathering Secret Lair Commander deck themed around virtual pop star Hatsune Miku, the first Universes Beyond crossover of its kind for the format. The deck will only be available to order for a strict 24-hour window next week, after which it moves to a limited print-to-demand model, reflecting Wizards' recent approach of using tight sales windows for high-demand collaboration products.

The 100-card, ready-to-play green-white deck costs $149.99 and goes on sale from 9am PT on 10 August until 8:59am PT on 11 August 2026, with limited stock shipping immediately and later orders arriving in May 2027 for North America or June 2027 for the EU and UK. It is led by a Miku-themed version of Trostani, Selesnya's Voice, built around a lifegain-into-board-advantage strategy using creatures such as Archangel of Thune and Crested Sunmare. The set includes 12 foil borderless cards with new Miku artwork, 14 foil borderless basic lands, 74 non-foil reprints (including Sol Ring and Aetherflux Reservoir), 10 double-sided tokens, plus a display commander and deck box.