Grand Arena Showdown Guide & Rewards

Grand Arena Showdown is a limited-time special event that mashes up Grand Arena and Sanctum Showdown: pick a Champion, build a deck around them, and score points with Sanctum Scoring instead of racing for Cubes. The reward track features the new Series 4 card Spider Sense. Next scheduled run: July 22, 2026.

How Grand Arena Showdown Works

Grand Arena Showdown is, in Second Dinner's words, "Grand Arena meets Sanctum Showdown". You pick a Champion and build a deck around them, the way Grand Arena works, but matches are scored with Sanctum Scoring: points earned for locations you hold, rather than the standard 6-turn Cube race.

The first run opens July 22, 2026, with the in-game queue open through July 29. The reward track pays out event currency along the way and features Spider Sense, a new Series 4 card. Spider Sense costs 5 energy at 0 Power with the ability "On Reveal: Give your characters here +2 Power. Costs 1 less for each Moveable card you've played."

Datamined event data includes a prebuilt Magneto deck built around Spider-Verse cards: Miles Morales Spider-Man, Spider-Man 2099, Spider-Man Brand New Day, Spider-Punk, Prowler, Kraven, Gwenpool, Jeff the Baby Dolphin!?, Nocturne, Vision, and Spider Sense itself, so movement decks look like the intended showcase for the first run.