"That much damage" refers to the number of +1/+1 counters removed from Ashling the Pilgrim
It would be easy to construct a Standard environment where Desecration Demon is crap (such as INN-RTR,) or where Prime Speaker Zegana is a chase mythic
Product Details (As this Saga enters and after your draw step, add a lore counter.) [I] For each opponent, up to one target noncreature artifact they control becomes a 0/4 Wall artifact creature with defender for as long as you control this Saga
Thats the only blemish here
In reality, this is more of a big creatures + Sarkhans Unsealing deck than a Dinosaurs deck, but its the closest weve been getting to seeing tribal effects succeed in Standard so were taking a look at it
A repeatable fling ability that gains you life is fantastic in aggressive decks, even if the typing restricts what you can toss