Aligned Hedron Network [Battle for Zendikar] NonFoil {G}{W}: Selesnya Keyrune becomes a

{G}{W}: Selesnya Keyrune becomes a 3/3 green and white Wolf artifact creature until end of turn

As long as the top card of your library is a land card

Set: Fate Reforged Type: Creature — Human Monk Rarity: Mythic Cost: {2}{W} Prowess (Whenever you cast a noncreature spell

At the very least

Aligned Hedron Network [Battle for Zendikar] NonFoil {G}{W}: Selesnya Keyrune becomes aSet: Battle for Zendikar Type: Artifact Rarity: Rare Cost: {4} When Aligned Hedron Network enters the battlefield, exile all creatures with power 5 or greater until Aligned Hedron Network leaves the battlefield. (Those creatures return under their owners' control.) The last hedron slotted into place, locking Ulamog in an infinite loop of binding energy.