Just dropping a fetch land after playing this card is nasty
2 Secret Lair Drop Market Price: $32.13 Blue does not host many Dinosaurs, as this Elder Dinosaur originally from Rivals of Ixalan is one of only six in Magics history, but what a Dino it is
On the other hand, while foil drop rates in normal Standard sets have increased recently, in the past, you'd open a foil mythic about one in every three boxes (and this might be being slightly generous), which means to open an original foil Theros printing of Heliod, God of the Sun, you'd have to open roughly 45 boxes of Theros, which means getting 50,000 copies would take 2,250,000 Theros booster boxes, which at $100 would add up to $225 million
Have you tried TAG before
At least, that's the conventional story
Even though the card is graded, buyers want to see the actual slab