The enchantment costs one, activates for two, and then you sacrifice anything, including tokens, draw a card, and then, you'll also gain that life too, don't sleep on that since many read that as losing life instead
If we are calculating the odds of hitting something with our Aetherworks Marvel, it would be 6 (the number of cards we look at with Marvel)
Because that would be crazy powerful, we added an ability where you had to pay life to untap things, which also plays into the "impotence" part of the name
You wont get all of them, but youll always end up with something
The second cares about going wide to draw cards through equipped attackers, and if Cloud is big enough, youll also get two treasure tokens
However, there are plenty of cards in Khans of Tarkir that are currently being overlooked by Commander players