Mary Jane Watson ensures that even your smaller spiders pay you back in card draw, which smooths out the turns during which you're setting up your board
Heres how it plays out: You are required to have The Gitrog Monster out, Dakmor Salvage in hand and more than 7 cards in hand total At the end of the turn, discard down to hand size, discarding Dakmor Salvage This gives you a draw card trigger from The Gitrog Monster Priority passes to opponents On resolution of the draw trigger, replace this with the dredge from Dakmor Salvage, milling 2 cards and returning Dakmor Salvage to hand As it is still the cleanup step you still need to discard down to 7 cards in hand, again discarding Dakmor Salvage and repeating the combo above on a loop The idea is you loop this to fill your graveyard and try to win from there
The trouble is that Arena doesnt cover Commander, which is Magics most popular format, and given the complexity of the interactions involved, theres every chance it never will
Where limits have been announced, the playmat is restricted to one per transaction and the Curators Collection to two
This orc creature turns each combat step into an opportunity to drain an opponent and make some treasure tokens, which is some great value
It also features The Gitrog Monster + Dakmor Salvage, a well-established self-mill engine