Teferi's Isle [Mirage] XY51 We encountered a valley topped

We encountered a valley topped with immense boulders and eerie rock formations

Set: Coldsnap Promos Type: Creature — Elf Warrior Rarity: Rare Cost: {5}{G}{G} You may exile two green cards from your hand rather than pay this spell's mana cost

Set: Planechase 2012 Type: Creature — Human Ninja Rarity: Rare Cost: {2}{U}{U} Ninjutsu {1}{U} ({1}{U}

you may pay {2}

Set: Commander Anthology Volume II Type: Artifact Rarity: Rare Cost: {3} As Urza's Incubator enters the battlefield

Teferi's Isle [Mirage] XY51 We encountered a valley toppedSet: 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.