Others are abilities that help a card break rules, like Rush on an Item card like White Rabbits Pocket Watch
While Powerline could sing it alone, you need two characters for the ability to work
Many, many characters in this deck are pirates - 24 different characters show up in this deck, of which 17 are pirates - and through various benefits and mechanics, the deck is telling you that it wants you to swing away with them and whittle down your opponents to get an upper hand on the board state
Abilities that apply "as [this permanent] enters," such as choosing a color with Crossroads Village, are also unaffected
Additionally, while The Queen's Castle only costs four ink to play, it will give two lore and has a defensive willpower of seven
To tell them apart from regular creatures or enchantments, saga creatures have a new card frame, and they have a box at the bottom with either flavor text (like Summon: Primal Odin) or extra abilities (such as flying for Summon: Bahamut)