For example, the difference between the power and toughness of a 3/5 creature is 2
Many energy cards are primarily designed to be one or the other, and exploiting the differing rates of returns between them using the efficient generators to fuel the powerful outlets is a big part of deckbuilding around this mechanic
9 Judgement Dragon Judgement Dragon is the main Boss Monster of the Lightsworn Archetype, which heavily relies on milling itself to get Lightsworn Monsters in the Graveyard
Card not found from Born of the Gods (2014) never even saw much limited play, because it was just so hard to use
These creatures come down and impact the board with their saga abilities, but the tradeoff is that they will leave after a few turns
In the first place, its hard not to be annoyed by any deck that easily drop 2000 ATK monsters and ritual monsters that can negate pretty much anything