For each instant and sorcery card with converted mana cost X or less among them, you may cast that card without paying its mana cost
Sunfrill Imitator as a cheap-ish Dino that can make big attacks as you unleash your larger Dinosaurs is a nice pairing with Belligerent Yearling to get these decks a little lower to the ground
Shes that little bit less training-wheels than Dihada, which counts for a lot
Glacier Godmaw Our third spot is this win-con also with landfall on a Lander maker
2 Muldrotha, The Gravetide One of the best Sacrifice commanders, Muldrotha, The Gravetide lets you recycle the cards you sacrificed right out of the graveyard
Combos do exist, but in order to get to them, you might well be taking some really long turns with the amount of mana producing spells and abilities that could sit in this deck