The card name not only describes the card but also is important to gameplay many cards will reference others, either as conditions to play a certain spell or another card in the same subtype (more on that later)
While you'll need a specific deck to make Glorious End work, I wouldn't be a bit surprised to see people trying it because the effect is fun and works well with other potentially painful end-of-turn triggers
Both of these abilities allow paying part of the cost of a spell not with mana, but using another method
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The big difference between the two, however, is that Humility causes all creatures in play to lose their abilities and become 1/1s, not just a single opponent