Five mana is expensive enough that you probably wont be able to afford any follow-up creatures, but this is still something you can play into if you dont commit too many of your own creatures to the board before you cast it
The Artifact Creature limitation also means plenty of green Creatures that normally can make use of +1/+1 counters (Pelt Collector, Kalonian Kydra etc.) will just be less useful
Finally, Virulent Silencer is the poison counter synergy card I did not expect to see in this set
The nice part of this deck is that its secretly a bleeder deck
For casual observers, it reinforces that trading cards can command prices once reserved for fine art
I imagine the best way to use this is to identify someone else at the table who would really want a new hand, see how much mana they can assist you with, and then leave only enough mana to cast Game Plan with assistance