A reasonable approximation of the expected power of gold cards is that your 2nd colour of mana adds about a 1/3rd of a mana, the 3rd colour adds 2/3rds of a mana and the fourth is a whole extra mana
Note that we dissociate this type of deceptive inking from accidental inking (the small stroke of felt-tip pen in the middle of the card, or ink on a sleeve that has rubbed off), to which we also give the Inked status, but which we note as Print lines This card has a clearly visible printline, a minor printing defect which is nevertheless quite frequent, but which will be included in the surface score
Erebos, Bleak-Hearted Erebos, Bleak-Hearted converts your random junk into removal while drawing plenty of cards
While its good in Mono-Red Aggro and Leyline in Standard, alongside playing well in explosive Commander decks, its hardly amazing everywhere
Whenever Barbed Servitor is dealt damage, target opponent loses that much life