These are two huge figures in World of Warcraft lore! Varian Wrynn is the King of Stormwind, and Rhonin is the former leader of the Kirin Tor. Read more about them here and here.

Varian Wrynn – Warrior Legendary – 10 Mana (7/7) – Battlecry: Draw 3 cards. Put any minions you drew directly into the battlefield.

Rhonin – Mage Legendary – 8 Mana (7/7) – Deathrattle: Add 3 copies of Arcane Missiles to your hand.