Gameplay, flavor, fandom, fun drafts, and good ol' classic broken cards
It is a great card to have in the cube, it has loads of nice synergies and it helps increase the overall consistency which in turn increases the overall quality of the games
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)
You can check out our guide to Magic: The Gathering Booster Pack types here, but the short version is that Collector Boosters are filled with alt art, foil treated and special variants of cards in any given set
Number 120 Language English Legal Formats Alchemy, Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Standard, Timeless, Vintage
Essence Scatter might be better as more copies of Stern Dismissal or another bounce spell, but it's to answer creature-heavy decks like Adventures