I still dont know for sure that its better or worse than Walking Ballista, but Ive cast it dozens of times now, and making a giant threat is occasionally just what the doctor orders
Likewise, there are cards such as Carrot that On Play and On Attack ensure one of your opponent's Rested characters remains Rested for the foreseeable future

Reward: Pack Hourglasses x12, Wonder Hourglasses x36, Shop Tickets x10 Secluded Springs secret missions Soaring Hoppip How to beat: Collect the regular art variants of Hoppip, Skiploom and Jumpluff ex Reward: Pack Hourglasses x12, Wonder Hourglasses x36, Shop Tickets x10 Legends Racing Across the Land How to beat: Collect the Two-Star full art variants of Entei ex, Raikou ex and Suicune ex Reward: Pack Hourglasses x12, Wonder Hourglasses x36, Shop Tickets x10 Secluded Springs Museum 1 How to beat: Collect the One-Star full art variants of Milotic, Stunfisk, Yamper, Latios, Phanpy and Azurill Reward: Pack Hourglasses x12, Wonder Hourglasses x36, Shop Tickets x10 Secluded Springs Museum 2 How to beat: Collect the Two-Star full art variants of Jumpluff ex, Entei ex, Raikou ex and Poliwrath ex Reward: Pack Hourglasses x12, Wonder Hourglasses x36, Shop Tickets x10 Pokemon That Can Use Attacks Immediately 2 How to beat: Collect the regular Mantyke, Igglybuff, Azurill, the One-Star Full Artwork Azurill, and the Crown Rarity Golden Mantyke

The other: a tribe of beasts, born without stigmata, who rose up to resist the invading Knights of Dogmatika
Luckily, your overall chances of getting a secret rare in a Mega Evolution pack are 19%, which is on the higher end of the regular Scarlet & Violet sets, where they ranged from 16% on the low end to 20% on the high end