While the first creature printed with the Dinosaur type was Pygmy Allosaurus from Ice Age , the type was removed in 2007 only then to triumphantly return with a (big) bang in Ixalan block and then was further bolstered in 2023s The Lost Caverns of Ixalan
An ideal first deck would contain a majority of the mechanics that Lorcana has to offer while containing many different strategies to explore
That's why Upheaval is such a bomb: there are virtually no ways to deal with it, and once it is cast you can end up with two to three creatures plus a land on the board while your opponent literally has nothing, and has a hand full of sixteen cards they need to discard down to seven
If you managed to grab them at the time, they are now some of the most sought after Lorcana cards
I would put it into a red/black graveyard matters deck and go to town
Modern Horizons 3 has a bonus sheet full of these, and two were shown off at MagicCon Chicago: Laelia, the Blade Reforged and Priest of Titania