It only takes a few hits with Blighted Agent when it's pumped up through any number of spells to increase its power, multiplying the number of poison counters it hands out as its power grows
Losing access to green means you wouldnt get to play a beautiful foil Cartographer or any of the other green explorers, but if thats not a dealbreaker, Ive put a rough list together for this build over on Archidekt
Between the counter distribution on ETB and the general benefits of being in green, we should have no trouble maintaining the largest creature
There are tons of Commander decks that focus on Auras or Equipment, and Codsworth, Handy Helper is an easy inclusion in the 99 of any of them that play white
As such, the easiest and simplest way to increase the desperately needed supply of Reserved List cards would be to reinstate the "foil loophole," which would allow Wizards to print an all-foil Reserved List Masters set
If a spell is exiled, it's removed from the stack and thus will not resolve