Potion of Eternal Knowledge

Whenever you draw a card, you may reveal it.
If it's an instant or sorcery card, draw a card.
{2}, {t}, Sacrifice Potion of Eternal
Knowledge: Draw a card, then discard a card.
"It is a mercy I grant them, dear. This way,
they die knowing they gained something."
-Rokalos Vidakro, to Ferith Dasos