Mulligans
General Mulligans
im not too sure what to keep but basically embiggen and ramp are always good keeps.
So im not sure what the exact number would be but there are a few pretty decent 4 mana cards that could be Embiggen into some pretty good pulls with Guardian Animals . a 5/7 with stealth using a Escaped Manasaber , a 4/8 with Hippogryph or even Circus Amalgam could be a 6/7! idont know if its the best idea but i think Embiggen could be brought back with a few additions. will it be strong? who knows but theres alaway a chance