The natural check is already sitting in the format, Darkrai is Grass weak, and that Teal Mask Ogerpon style Grass aggression is exactly the kind of deck that punches straight through a 280 HP Basic
Among commons, Oreplate Pangolin and Selfcraft Mechan not only trigger Mm'menons ability but also provide additional benefits for loading your deck with artifacts
UR Ultra Rare Gullveig of the Nordic Ascendant X LIGHT Link 1 [ FairyLinkEffect ] ATK 800 DEF - 1 Level 5 or lower "Nordic" monster If this card is Link Summoned: You can banish up to 3 cards from your hand and/or field, and if you do, Special Summon that many "Nordic" monsters from your Deck in Defense Position, also, for the rest of this turn, you cannot Special Summon monsters, except "Aesir" monsters, nor Normal Summon/Set any monsters
As a monster, this card has tremendous piercing + direct fire power, but I'm worried about its low ability despite the difficulty