Plus, since its an X-spell, its a great mana sink
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
If the Evoke cost is paid, the creature is sacrificed when it enters the battlefield
Putting permanents directly into play doesn't count as casting a spell , so it doesn't progress the day/night cycle
You want cards entering and leaving your graveyard as often as possible to trigger Teval's ability