Spells are necessarily only offensive, they can also be used to protect your own creatures, to disrupt the opponents strategy by blocking their attacking creatures, making them discard cards, etc., or utility spells that can draw you more cards, or search for specific cards in your deck
Let me tell you why
His three lands got tapped
Horizon Canopy, Grove of the Burnwillows, Aether Vial, Oblivion Stone, Glimpse the Unthinkable, Lotus Cobra, Magus of the Moon, Bloodghast, Thoughtseize, Flusterstorm, Ancestral Vision, Cryptic Command, Auriok Champion, Serra Ascendantthese were all very expensive cards
Same as Dress Down, it provides solutions to decks that cant answer big constructs which also serve its usefulness in multiple matchups
Here you see that the deck list includes the number of cards (1-4 except for basic lands), the card name, and then the 3-letter set code followed by the collector's number