Truth be told, Ohran Frostfang is probably the better card out of the two, but both are really good, together or on their own
I'll leave the comments open below so you can tell me what your favourite goblin is and tell me how wrong I am for not including it.
Furthermore, it costs three mana and a creature just to get a 3/3 out of it
Kellan, Planar Trailblazer Rarity: Rare TYPE: Legendary Creature SUBTYPE: Human Faerie Scout CMC: 1 Mana cost: USD: $0.36 EUR: 0.40 TIX: 0.02 EDHREC RANK: 12353 (2/1) : If Kellan is a Scout, it becomes a Human Faerie Detective and gains "Whenever Kellan deals combat damage to a player, exile the top card of your library
Delightful Discovery helps build tension with your opponents
And then you can bounce it or flicker it or something to get it again if you want to keep stealing artifacts permanently