Re:Zero acts as an interesting marker in the history of Weiss. One could even argue that if Nisekoi was the progenitor and stand-out for the standardization of the deck building process, Re:Zero could be considered to be a core exemplar of the general deck building image at the time. Spurred by both popularity and powerful cards, Re:Zero took the scene and became a common contender for top cuts wherever it was played.
It is hard to undermine the power and importance of the Emilia combo above. The game was moving a different direction away from the standard Shimakaze profile that was the general face of the early game combos. Emilia gave access to a combo that gave hand advantage without costing a reverse. Her condition was especially easy to support, and furthermore, she would also mill the deck while performing her combo, helping for the early refreshes.
RZ/S46-035S-SR 木漏れ日の下で レム&ラム (center)
RZ/S46-064R 無垢な美少女 エミリア (right)
In addition, the set had access to a plethora of filtering options. Despite not having Shimakaze’s direct search or salvage for a specific card, the deck was able to generally maneuver pieces in its hand for other pieces as needed, making the plus from the Emilia combo not as important. And they also had their own self-tap brainstorm, which was becoming a common staple at the time.
Being enormous and an early play healer made Rem a constant threat and a standout at the time. Rem presented a field threat that could continually grow overtime if not dealt with properly. Rem was a problem where the opponent was forced to answer her quickly, or she would be able to get out of control real fast.
Although Re:Zero’s end game was rather varied and was not notable for its power ceiling, Re:Zero had one of the most consistent decks in its time. Its mid-game carried by Emilia and recycling filters gave it a lot of staying power which could put it miles ahead in advantage ahead of its opponent.