Dragons are one of Magic's most iconic creature types, typically combining flying with large bodies and powerful abilities. Dragon decks often devote significant space to ramp and cost reduction so their expensive threats can arrive before the game is already over.
Lathliss, Dragon Queen turns each nontoken Dragon into another flying threat, Scourge of Valkas converts Dragons entering into damage, and Klauth, Unrivaled Ancient can produce extraordinary amounts of post-combat mana.