(You can still play a companion if you had it in your hand, as you would any other creature)
Its good with mechanic counters like flying counters, trample counters, or shield counters, so you can spread them around or even grow the Aven itself
The activated ability doesnt make me want to keep it either
Proxies are replacements for destroyed or worn-off cards and not to mistake these with counterfeits either, that are fake prints illegal to the Wizards of the Coast policies and copyright laws
Evolving Skies (dubbed by fans as Evolving Cries) had extremely difficult pull rates and Umbreon was the hardest chase in the set
Aquatic Alchemist is one of several commons that really help as an early blocker, it can pull a lot of duties in the deck as its adventure gets you a spell back (on top of the deck isnt ideal but it's workable), and when you trigger its ability it goes from a decent 1/3 blocker to a 3/3 body that is able to pressure or trade upwards