Without descend active, this ends up being a subpar Regrowth effect, which isn't always in demand
Then, when at least one creature with counters on it deals damage to a player, you draw a card and proliferate, meaning that all your creatures with at least one token receive an additional token
Niv-Mizzet, Parun enables access to plenty of great storm cards, while also being a very powerful engine piece by itself
You wont be able to loop with those permanents and there are cheaper creatures you can use instead, but doing this a couple of times may be enough for the table to scoop
It was a different world back then
Baxter, Fly in the Ointment | 3 Colorless Mana, 1 Blue Mana Legendary Creature Insect Mutant Scientist Whenever Baxter enters or attacks, each creature you control with a counter on it gains flying until the end of the turn