Brianna, Discovery Adept

Whenever a Dinosaur enters under your control,
you may search your library for a Dinosaur creature card with mana value 3 or less and put it into your hand, then shuffle. If this is the third time this ability has triggered, transform Brianna.

{t}: Add one many of any color. Spend this mana only to cast Dinosaur spells or activate abilities of Dinosaurs you control.