The problem is that a 2/2 (even a 2/2 with flying) can be outclassed fairly quickly, so delaying Vexing Gull trades its early game relevance (pecking in for damage) for mid-game value (when you might be behind in the race or not be able to attack with Vexing Gull)
Illustrated by Igor Kieryluk Amonkhet Invocations #3 Rulings for Containment Priest 4 2021-03-19 Containment Priest's last ability won't affect any creatures that were cast, including ones cast from unusual zones such as your graveyard
The card's effect is that it simply stops the current game, use your current deck at the time as a deck for a new game
We rebuilt that file many times, and playtested many times, so it was a lot of work
$1.29 Haven of the Spirit Dragon Tarkir: Dragonstorm Commander Decks $1.29 Kairi, the Swirling Sky Kamigawa: Neon Dynasty $0.59 Keiga, the Tide Star Tarkir: Dragonstorm Commander Decks $0.39 Encroaching Dragonstorm Tarkir: Dragonstorm $0.99 Ao, the Dawn Sky Kamigawa: Neon Dynasty $0.79 Dromoka, the Eternal Fate Reforged $1.29 Ramos, Dragon Engine Foundations $1.29 Rivaz of the Claw (Showcase) Dominaria United Variants $1.49 Sarkhan, Soul Aflame Tarkir: Dragonstorm Commander Decks $0.69 Crux of Fate Final Fantasy Commander Decks $0.79 Temple of the Dragon Queen Tarkir: Dragonstorm Commander Decks $0.99 Scaled Nurturer Commander Legends: Battle for Baldur's Gate 0 results found
Enhanced Commander Display: The box integrates a BCW/UltiPro mini snap case, a standard top loader, or a DIY mini snap case for showcasing your commander card in its full glory