there is a reason Wizards does not print new cards with it
They may not be inherently powerful cards, but offer enough individuality that MTG and D&D fans will be after these
Especially in the early turns, it can be difficult to decide whether you should spend your mana on a face-down creature, which could affect the game later, or spend it on something that will build your board state now
Upgrade (This creature enters the battlefield covering another artifact you control If it can't, exile it Ignore the artifact it's covering Anywhere this card goes, cards underneath it also go It has haste.)
Depends on what gets milled, but either way this fuels cards into your graveyard to fuel those leaves graveyard effects by giving you targets for them, which is something to consider over just the damage in this deck
Someone who would demand answers to the question, "Why is this not too good?" It seems painfully obvious theres no one wearing that hat up in Renton