Nilvec's Discount Potions

{u/r}{t}: discard a card and then roll a d20. This
ability can be activated as a sorcery.
•1. Blackout- immediately end turn.
•2-6. Bad Batch- lose 2 life and discard 1 card.
•7-14. Insight. Surveil 1
{bull}15-19. Gain 2 life and draw 1 card.
{bull}20. Temporal Potion. Exile Nilvec's
Discount Potions. Take an additional turn
After this turn.