Pantlaza, Sun-Favored - 4 M LCC

Whenever Pantlaza or another Dinosaur you control enters, you may discover X, where X is that creature's toughness. Do this only once each turn. (Exile cards from the top of your library until you exile a nonland card with that mana value or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)

mythic
Legendary Creature — Dinosaur
From the Magic: The Gathering set The Lost Caverns of Ixalan Commander.