This is among the best Enrage abilities across any Dinosaur card, and even if you only get one or two lands out of this, it will still likely have been worth the investment as a blocker or in a pinch an attacker backed up by combat tricks or a fight/bite spell
If you cast a spell for another cost "rather than paying its mana cost", such as an emerge cost, you can't choose to cast it for any other alternative costs
Its simple, powerful effect is so universally beneficial that it becomes an automatic inclusion in tens of thousands of unique decks
Ironically, the past took everything away from him
Then, at the beginning of your combat, you can move all the counters onto a creature of your choice
Now you're actively rewarded for getting rid of your lands at exactly the right time