Another way to tell is by looking at the banner behind the card's name
Slaughter printing is noticeably scarce, suggesting the supply for this card is seriously dwindling at the time of writing
My chops include winning a junior GP, making a deck that got a card banned, writing an article that got an Alchemy card nerfed out of existence, and hitting #1 on the Arena ladder
It has a respectable 150 damage, and if it has two extra Energy attached to it the damage gets boosted to a fantastic 250
Select auto-build and then the desired energy types, and a deck will be automatically built using cards you own
Getting all players to discard a card and for you to draw four is already annoying, but getting two triggers off this at once, netting you up to six cards for three little mana, is another story altogether