According to Wizard's official statement, this change to the Magic: The Gathering Warhammer 40,000 release date is due to "ongoing global supply chain challenges and delays in production"
Game Over is full of Sorcery cards that involve villains from the series, Grimoire is a mix of Instant and Sorcery abilities from heroes, and all of the Weapons ones involve Artifacts with series heroes wielding them
This was clearly a test of the concept of serialized cards in Magic, but to my knowledge, their existence has never been officially acknowledged by anyone at Wizards
I dont see Elspeth Resplendent breaking into Standard, much less other constructed formats though
Blue can often be found helping out aggro strategies through the use of tempo
Sword of the Animist Sword of the Animist is the classic ramp equipment