Chaos Orb can destroy any permanent that it touches, along with itself, once the physical card is flipped like a coin over the table
Like most Magic: The Gathering cards, the value of Black Lotus depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Vintage Championship)
Feel free to stop by my Hive if you wish to have a look and see an alternative take
This means it is a Gate, Locus, Cave and so much more
I think he should sustain every bit of the $17 he already is priced at
So, Urza, Lord High Artificer is a four mana Blue 1/4 that makes a 0/0 Construct token that gets +1/+1 for every Artifact you control