Ral, Monsoon Mage

Legendary Creature — Human Wizard // Legendary Planeswalker — Ral

Instant and sorcery spells you cast cost {1} less to cast. Whenever you cast an instant or sorcery spell during your turn, flip a coin. If you lose the flip, Ral deals 1 damage to you. If you win the flip, you may exile Ral. If you do, return him to the battlefield transformed under his owner's control.