Teferi's Isle [Mirage] Swamp Mountain sacrifice it unless you sacrifice

sacrifice it unless you sacrifice any number of creatures with total power 12 or greater

The cube's surface is pockmarked with jagged runes that seem to shift when unobserved

"Tell me again

" —Kikuyu Proverb

Set: Magic 2013 Type: Legendary Artifact Rarity: Mythic Cost: {7} Creatures you control have flying

Teferi's Isle [Mirage] Swamp Mountain sacrifice it unless you sacrificeSet: Mirage Type: Legendary Land Rarity: Rare Phasing (This phases in or out before you untap during each of your untap steps. While it's phased out, it's treated as though it doesn't exist.) Teferi's Isle enters the battlefield tapped. {T}: Add {U}{U}. The three wizards knew only that this isle held a great mysteryand that patience alone would solve it.