Spells that can use 8 mana only exist in blue, red, and green
While now they're a staple of Magic , the origins of transforming double-faced cards date back to the original Innistrad block
They include the Alpha Mox Pearl, Alpha Mox Sapphire, Alpha Ancestral Recall, Alpha Time Walk, Alpha Timetwister, and the coveted Beta Black Lotus (Chris Rush Artist Proof)
Other cards found in the Ursulas Return set that feature this new approach to the Shift keyword include Flotsam & Jetsam, Entangling Eels - which a five strength/five health card that requires two cards to be discarded - Diablo, Devoted Herald, a card that requires players discard an action card, Li Shang, Valorous General - with players needing to discard a character card to Shift it in - Olaf, Carrot Enthusiast, a Sapphire card that can be Shifted by discarding an item card, and steel card Aladdin, Brave Rescuer: which requires that a location card be discard for it to be Shifted
There are many categories of ramp, the most common of which are: Mana Rocks: Artifacts that generate mana
If a replacement effect causes the top card of your library to go to a zone other than your graveyard, Aberrant Researcher will still transform if that card was an instant or sorcery card