amass mtg cards Magic The Gathering Trading Card Game Iconic Masters Single Card Common the Components 41 Foil Crush Dissent · War of

Putting the Azorius artifacts deck aside, Cori-Steel Cutter rules the entire format

Aboleth Spawn lets you copy an opponents Dockside Extortionist trigger, and because of Active-Player/Non-active-Player ordering, your trigger will then resolve first, so youre free to try and win in someone elses turn

In addition to this, a big part of the reason these cards were so popular was because the mana in that Standard format was quite bad, to the extent that you were pretty close to wanting Attune with Aether in your decks even before the energy bonus, but once you have the energy bonus you might as well play Harnessed Lightning, which means you may as well play Rogue Refiner to power up your kill spell, and so on

They are both 1/1 creatures for one mana that can prevent combat damage by being sacrificed

Really just a mana rock, but also built in exile to play, and you could do things like flicker it and such