Mirrorshell Crab:
This is the first ever printing of Stifle in pauper. While it's not the same hard counter, the printing of this effect reflects on how powerful some of these abilities & triggers can be. I see this card fitting well in a control shell and would especially work well in TortEx decks.

Chainflail Centipede & Simian Sling:
These are an amazing new take on equipment cards akin to the living weapons like Flayer Husk and bestow creatures like Nyxborn Rollicker. Voltron style decks usually suffer from having to aggressively mulliganing to draw the right hands and lack the resilience to go against creature removal heavy decks. Being both creatures and equipment when you need them to be really helps fill in that archetypes weakness and lets the player adapt to the situation.

Okiba Reckoner Raid, Era of Enlightenment, The Modern Age, & The Shattered States Era:
Sagas are finally in pauper! While the individual effects on the sagas aren't impressive but are what you'd typically expect with the amount of mana invested, the culmination of all these effects tell a much different story. I expect these cards to perform well in grindier games, with the exception of the red and black sagas being decent finishers for aggressive decks.

Greater Tanuki & Sunblade Samurai:
These two creatures are channeling their inner land-cycling creatures like Noble Templar & Wirewood Guardian, but with more aggressive stats and extra effects tacked onto their alternative abilities.

Experimental Synthesizer:
This is another test in changing red's identity of being solely the aggressive colour. This is a cheap cantrip in red which also provides a nice little bonus of saccing itself to generate a body, and plays incredibly well with flicker effects.

Ecologist's Terrarium:
This is a great filler card that can slot into a lot of slower decks. Fixes mana and can grow creatures into larger threats, this card is just great in all aspects of the game. It doesn't always guarantee that it'll bring you back from a lethal board state but it does shine really well in a lot of other game environments.

Moon-Circuit Hacker:
Not as consistent as Looting il-Kor, however this card is by no means a rip-off. It has a cheap ninjutsu activation and the benefit of being able to play couple of turns earlier unlike Ninja of the Deep Hours.

Spirited Companion:
This card invokes it's inner Elvish Visionary.

Imperial Oath:
Oath! That's a lot for 6 mana. 6/6 worth of stats with what's basically a card and a half.

Dragonfly Suit:
Much like Sky Skiff, this card provides an excellent evasive body that can be crewed by tokens. It's most suited to aggressive creature decks.

Undercity Scrounger:
While generating treasure isn't new to aristocrat style decks, being able to (potentially) do this once a turn is. If you've sat across your opponent with a horde of treasure tokens waiting to be cashed in, then you'll understand how much pressure it puts on you.