old mtg cards Vintage Lot 50 from 1993–2003 | Frame | No Duplicates | R, UNC, C 3(GW)(GW) Magic The Gathering Secrets of

Whenever a Land enters the battlefield under your control, you get to add one mana of any color to your mana pool

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

It's hard to stop, and the number of cards that exist that can feasibly answer it are few

If the Evoke cost is paid, the creature is sacrificed when it enters the battlefield