This a great card for any deck that reliably gets two or more of the party creature types in play
5 Nightmare One of the original rare creatures from all the way back from the Alpha set, Nightmare is a powerhouse in a mono-black deck
2 Primal Might Simple, Highly Powerful Fight Spell Simple yet brutally effective, Primal Might was a major player in Monogreen Stompy decks when it was legal in Standard
One of my favorite games to play during spoiler season is to try to find legends that either add layers to existing cards, or commons and uncommons that provide a critical mass of effects to enable existing strategies
However, traditional White Weenie has a plan for turn 3, and it involves casting a Razor Golem (better power to cost ratio) or a Squadron Hawk (pure card advantage)
Saheeli, Sublime Artificer I think Im less excited about Saheeli, Sublime Artificer than some of my peers, but I do recognize the value a Young Pyromancer proxy that isnt targetable by creature removal can potentially provide