The mechanic is nice, but this card overall seems weak since there isn't really
mass PC. 3
+ 1 card for +1|+0 isn't much, unless there's a Trident. It also needs to get out early + have a creature out to be effective which can be problematic against EQ, and is also vulnerable to any deck with lots of PC because it's a permanent itself.
I would recommend this being a creature with 0 ATK and/or the cost being reduced to 1
for both unupped and upped.