Collector boosters focus on foils and rare treatments, making them more fit for collectors, while set boosters lean toward casual fun with story-driven cards and regular lands for more regular play
The key limitation to keep in mind is that the enchantment sacrifices itself at the beginning of the end step, so youre working on a clock
I don't know that I really like Serra as the flying lord
3-mana: +: One 0/1 (Nissa, Voice of Zendikar), one 1/1 with defender (Daretti, Ingenious Iconoclast), one 1/1 with upside (Grist, the Hunger Tide, Modern Horizons) 0: Two 1/1s you sacrifice at end of turn (Chandra, acolyte of flame, not actually protective tokens) -1: One 1/1 with flying (Dovin, Grand Arbiter
Revisit the rich history of the world of Dominaria