Using your graveyard as a resource is a long tradition in magic
Because It Came from Planet Glurg doesn't target you can also copy any creature on the battlefield regardless of having hexproof or shroud
You can always upgrade the tribe with generic upgrades like Metallic Mimic, Adaptive Automaton, Coat of Arms, or Door of Destinies too
When it comes to gameplay mechanics, Paradox Rift, the recent expansion to release in the Pokemon TCG: Scarlet and Violet series, has a few dark horse cards to tip the battle in your favor, like the Iron Hands ex and Roaring Moon ex cards
Chord of Calling is like 18 inches by 24 inches, which, though big for MTG art, means those figures are so small on the surface that they are a pain to paint traditionally
I think with it will be possible for someone to make day two of the next GP with this budget deck