It can struggle against decks that dont care about card advantage or that operate primarily from the graveyard
You can sacrifice an artifact to create a 3/3 token, which is a decent size
That would have to be a guestimation of what it cost him to buy them because one card can go for so much more than that
Collection mechanics, limited-time drops, seasonal updates, and expansion cycles should be designed to: If your product roadmap does not generate regular visibility spikes, marketing efficiency will decay over time
For (1)(U), this sorcery looks at your top three cards and puts one in your hand, however, if your graveyard contains at least one instant and one sorcery, you take two instead
If Valkyrie Aerial Unit costs around 4 mana or less, it looks incredible