Giants are a creature type known, unsurprisingly, for large bodies and expensive spells. Giant decks frequently pair mana acceleration or cost reduction with typal payoffs that make their already substantial creatures even more difficult to handle.
Stinkdrinker Daredevil reduces Giant costs, while Sunrise Sovereign gives other Giants a substantial combat boost and trample. Realm-Cloaked Giant doubles as both a massive creature and a board wipe.