If you want to buff this Commander Deck, other cards that make artifacts hexproof and/or indestructible could certainly be very fun, as barring a board wipe, this would prevent most damage, and help to keep your Commander alive, and annoying
Let's look at that Bloodfire Colossus again
Alternate Art Vs include Charizard, Lumineon, Honchkrow, and Arceus
UV & SCRATCH RESISTANT: UV protection blocks harmful rays that fade artwork and colors, preserving your boxes vibrant look and value
PCC - Magical Shot 120 Grant (Supporter) During this turn, your F Pokmon's attacks do 30 more damage to your opponent's Active Pokemon
And talking of it, the Mega Venusaur ex card completes a triptych set with Bulbasaur and Ivysaur in gobsmacking artwork by very new Pokmon artist mashu