Pantlaza, Sun-Favored

Whenever Pantlaza, Sun-Favored 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.)