Heir to Dragonfire is a rare Creature — Human Warlock card from Alchemy: Wilds of Eldraine (YWOE), collector number 10.
{R}: Heir to Dragonfire gets +1/+0 until end of turn. {2}{R}, Reveal Heir to Dragonfire from your hand: Heir to Dragonfire perpetually becomes a Dragon, gets +3/+3, and gains flying.