Knight of the Stampede
Creature — Human Knight
Dinosaur spells you cast cost 
less to cast.
"My whisper becomes a thousand roars."
Steve Argyle
Rivals of Ixalan (RIX)
• #138Rulings
If an effect refers to a “[subtype] spell” or “[subtype] card,” it refers only to a spell or card that has that subtype. For example, March of the Drowned is a card that benefits Pirates and features Pirates in its illustration, but it isn’t a Pirate card.
(wotc • 2018-01-19)
Rulings
If an effect refers to a “[subtype] spell” or “[subtype] card,” it refers only to a spell or card that has that subtype. For example, March of the Drowned is a card that benefits Pirates and features Pirates in its illustration, but it isn’t a Pirate card.
(wotc • 2018-01-19)