{T}, Sacrifice Memory Jar: Each player exiles all cards from their hand face down and draws seven cards. At the beginning of the next end step, each player discards their hand and returns to their hand each card they exiled this way.
"Every device in the rig is evidence of Thran enlightenment. All mana was the same to them, whether from rock or water, growth or decay. Can you imagine such unity of vision?" —Urza, journal
Echo {4} You may choose not to untap Thran Weaponry during your untap step. {2}, {T}: All creatures get +2/+2 for as long as Thran Weaponry remains tapped.
Faerie Conclave enters tapped. {T}: Add {U}. {1}{U}: Faerie Conclave becomes a 2/1 blue Faerie creature with flying until end of turn. It's still a land.
Forbidding Watchtower enters tapped. {T}: Add {W}. {1}{W}: Forbidding Watchtower becomes a 1/5 white Soldier creature until end of turn. It's still a land.
Ghitu Encampment enters tapped. {T}: Add {R}. {1}{R}: Ghitu Encampment becomes a 2/1 red Warrior creature with first strike until end of turn. It's still a land.
Spawning Pool enters tapped. {T}: Add {B}. {1}{B}: Spawning Pool becomes a 1/1 black Skeleton creature with "{B}: Regenerate this creature" until end of turn. It's still a land.
Treetop Village enters tapped. {T}: Add {G}. {1}{G}: Treetop Village becomes a 3/3 green Ape creature with trample until end of turn. It's still a land.