This is a five-mana white enchantment that reads: If one or more creature tokens would be created under your control, that many 4/4 white Angel creature tokens with Flying and Vigilance are created instead. Basically, if you were going to make a 1/1 Goblin token, for example, you would instead make a 4/4 angel with Flying and Vigilance
Making a 3/3 every turn is alright, but Garruk, Primal Hunter isnt really a playable card
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
Hitting retailers today, the new set introduces new Vineling glimmers, Enchanted cards, and Shift abilities
You get to add extra +1/+1 counters, but more experience counters that produce more counters, and so on
All of this, plus the novelty of the name of the card, leads to it being one of the most valuable Arabian Night cards