Othrandir, The Philosopher

Whenever a player draws a card, they may reveal
it. Revealed cards remain revealed and have
Transmute {3}. Whenever a player transmutes,
you gain 3 life and draw a card.
Discard a card with mana value X and pay X life:
Counter target spell with mana value X.
"If you tell people everything, you take away their
opportunity to learn."