Is Soul Stair Expedition legal in Standard, Modern, and Commander?

Soul Stair Expedition is legal in: Modern, Legacy, Vintage, Commander, Pauper.

Soul Stair Expedition

Q: What type of card is Soul Stair Expedition?

Soul Stair Expedition is an Enchantment. Its oracle text reads: "Landfall — Whenever a land you control enters, you may put a quest counter on this enchantment. Remove three quest counters from this enchantment and sacrifice it: Return up to two target creature cards from your graveyard to your hand."