The upsides include being able to loot reliably on turn two if in opening hand and that getting to level three is quite easy in the mid and late game turning this guy quickly into a game winner
Destrudo going into an Ancient Fairy Dragon can help create a decent board that could end with a Sleeper Resort setup, primarily due to Ancient Fairy's Dragon's ability to both search a new Field Spell and to Special Summon from the hand
If a duelist ends their turn without having had a monster on their field at any point during that turn (or attempted a Summon that was negated), they lose the duel unless there is a card effect in play that prevents their opponent from attacking during the next turn
Compared to special arts and art rares and all the new stuff Pokemon has done since SM, rainbow rares are the least desirable and most creatively bankrupt
Howling Mine and Winter Orb were originally printed as Continuous Artifacts, meaning they would work continuously as long as they were untapped
Tomato brings a toolbox system to the table, too