I got my butt handed to me so many times at local PPTQs by Esper Dragons, as my Siege Rhinos couldn't bear the might of Dragonlord Ojutai and Silumgar, the Drifting Death
Though not as valuable as the Blastoise, fewer perhaps exist of the Chancey card
It has even more value than Bitterblossom thanks to the lifelink ability
Additionally, we have several other support cards that work with the Dinosaurs in this deck, such as, for instance, Ixalli's Lorekeeper, a 1-drop that can create mana of any color, so your Dinosaurs can go on the board earlier and activate their abilities more often
Meathook Massacre II After you get Meathook Massacre II down, everyone has to pay 3 life when their creatures die, or you steal them with finality counters
Aetherdrift is especially exciting in this regard because it brings a burst of brand-new vehicles, a card type that pops up occasionally, but rarely in such numbers