If an older card that has rotated out receives a reprint in a newer, legal set (with a current regulation mark), then older printings of that same card become legal to use in the Standard format again, as long as their effect text is identical to the reprinted version
Together they play an okay match, but both were clearly intended to be upgraded with cards from the Theros block
Link Monster WATER Marincess Blue Slug 1 Level 4 or lower "Marincess" monster If this card is Link Summoned: You can target 1 "Marincess" monster in your GY, except "Marincess Blue Slug"
Curious about how to display large Pokemon cards
Lastly, its worth mentioning that a few non-goblin cards from The Lord of the Rings like Saruman, the White Hand, Corsairs of Umbar, and Uglk of the White Handcan boost both orcs and goblins
Both starter and booster packs are also sold on the respective GameStop, Best Buy and Walmart websites