They have a variety of mini-themes between them (with the sets new mechanics, Learn, Lessons, and Magecraft connecting them, but well get to those in a minute) and a college-specific token that functions as its mascot
Crystal clear front and 100% opacity with textured back
In particular, there is a pattern where you play Lightning Storm first and then can't develop your board
Without lot traceability, one successful card can make the whole purchase appear more profitable than it was while unsuccessful submissions disappear into general expenses
Horn of Greed often counts as colorless card draw, but it also gives your opponents some agency to avoid the worst of your wincons
Basics of Link Summon #2: In order to summon a Link-n monster, n monsters are needed as Link Materials