For 2 Mana in the first Spree mode, its a fair deal
Here's what you'll find in all The Brothers' War Jumpstart Boosters: Infantry 1 1 Rescue Retriever (Jumpstart Booster rare) 1 Random white rare or mythic rare 1 Aeronaut Cavalry 1 Airlift Chaplain 1 Lay Down Arms 1 Phalanx Vanguard 1 Recommission 1 Recruitment Officer 1 Static Net 1 Warlord's Elite 1 Veteran's Powerblade 1 Reconstructed Thopter 6 Plains 2 Traditional foil Plains Infantry 2 1 Rescue Retriever (Jumpstart Booster rare) 1 Random white rare or mythic rare 1 Aeronaut Cavalry 1 Ambush Paratrooper 1 Lay Down Arms 1 Phalanx Vanguard 1 Static Net 1 Thopter Architect 1 Warlord's Elite 1 Scrapwork Cohort 1 Veteran's Powerblade 1 Yotian Frontliner 6 Plains 2 Traditional foil Plains Powerstones 1 1 Geology Enthusiast (Jumpstart Booster rare) 1 Random blue rare or mythic rare

The name of the card is an allusion to the traditional Christmas carol called "Deck the Halls", as well as a meta-reference to "topdecking" which refers to playing a card on the same turn you draw it, often in a way to swing the game in your favor (which also provides its connection to the miracle keyword)
Giving an opponent who is behind on board some extra Creatures to work with isnt a big downside, and may even help you gang up on someone who is far ahead
Given Ulamogs comparative strength in the set, it only makes sense that the borderless version of the card would top the charts in terms of value
Plenty of Pluck checks off both of these boxes