Free-casting spells has always been one of the strongest things you can do in Magic, and the reminder text clarifying that the trigger happens after you finish Scrying or Surveilling makes it even cleaner to set up
They also basically never expire, making one wonder if they are food at all
Koma offers something different compared to other Simic Legendaries as it cares about interacting in combat, rather than unloading your hand with lands to draw more cards
Each artifact you tap after you're done activating mana abilities pays for .) Destroy all nonartifact creatures
These are the most consistent decks in Standard and the most played on the Arena Ladder: Izzet variations (prowess, elementals, lessons): These decks all play a lot of blue and red cantrips/burn/lessons to fill their graveyard and exploit synergies, like lessons in the graveyard, cost reduction, or elemental creatures