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Jace's Mindseeker
{4}{U}{U}
Creature -- Fish Illusion
4/4
Flying
When ~this~ enters, target opponent mills five cards. You may cast an instant or sorcery spell from among them without paying its mana cost.

Jace, Telepath Unbound
Legendary Planeswalker -- Jace
5
[+1]: Up to one target creature gets -2/-0 until your next turn.
[-3]: You may cast target instant or sorcery card from your graveyard this turn. If that spell would be put into your graveyard, exile it instead.
[-9]: You get an emblem with "Whenever you cast a spell, target opponent mills five cards."

Mind Sculpt
{1}{U}
Sorcery
Target opponent mills seven cards.

Patient Rebuilding
{3}{U}{U}
Enchantment
At the beginning of your upkeep, target opponent mills three cards, then you draw a card for each land card put into their graveyard this way.

Sphinx's Tutelage
{2}{U}
Enchantment
Whenever you draw a card, target opponent mills two cards. If two nonland cards that share a color were milled this way, repeat this process.
{5}{U}: Draw a card, then discard a card.