If all of the damage is prevented, the effect of The Rollercrusher Ride's first ability no longer applies
Izzet Dragons ultimately thrived specifically because it had access to cheap ways to replenish those resources
Proliferate X times is just a silly line of text, even if theres a real stipulation in place to enable it
The baseline here is basically a 5-mana 3/2 and a 2/2, but it's so much better than that -- not only because it can just be one big creature, but also because endure keeps triggering when it attacks
ButI worry a little bit about the many situations where you cant really effectively tap your merfolk to get it going and those are definitely going to come up
They see only vague shapes rustling behind the leaves, which is represented in game by the disguise mechanic, letting all sorts of creatures sneak up on opponents