Kadabra

Instant and Sorcery spells you cast cost {1} less.

Whenever you cast or copy an instant spell, target opponent mills a card.

Whenever you cast or copy a sorcery spell, target opponent discards a card.

Evolve - Trade - Transform Kadabra. Target opponent chooses an instant or sorcery spell in your graveyard and casts it without paying its mana cost.