Of course, if you played a Grim Monolith on turn two, you could realistically play Academy Rector on turn three, then immediately sacrifice it to Phyrexian Tower, giving you a Yawgmoths Bargain and three mana to work with
Manifold KeyManifold Key easily does the most powerful things, but is also the least powerful on its own
Its nice that Chandra, Torch of Defiance is either drawing you cards or adding mana the whole time shes ticking up, meaning the game is likely getting farther and farther in your favor the whole time
If a local enchantment phases in and the permanent has left play or is no longer legal to enchant, the enchantment returns to play and then is placed in its owner's graveyard afterwards
Try Coercion, Dark Inquiry, Diplomacy of the Wastes, Doomfall, Memory Leak, Memory Theft, Never Happened, Perish the Thought, Reckoner Shakedown, or Toil of the Invasion, if you just want to pluck a card of your choice out of an opponents hand for three mana