There are so many potential applications for this card, from generating a whole army of war machines with Mechanised Production to gaining absurdly huge pools of mana with Braid of Fire
That card has won entirely too many games for how many decks that play it
Ichor Wellspring ain't no proper egg in that sense (it has no built-in sacrifice ability), but assuming your deck hangs out with an entourage like Braids, Arisen Nightmare or Daretti, Scrap Savant and you can reanimate artifacts, you can draw a lot of omelets with this one
The simple rule is, if the card doesnt say you can, then you cant. How Can You Return Cards from Exile
Whenever you attack a player with a creature that has power four or greater, you draw a card
Love - Sheoldred's Edict Starting off with a gimmie - Sheoldred's Edict is the best Diabolic Edict effect ever printed and it's not particularly close