Scourge of the Throne

Scourge of the Throne

Creature - Dragon | Power/Toughness: 5 / 5 (CMC 6)
Flying
Dethrone (Whenever this creature attacks the player with the most life or tied for most life, put a +1/+1 counter on it.)
Whenever Scourge of the Throne attacks for the first time each turn, if it's attacking the player with the most life or tied for most life, untap all attacking creatures. After this phase, there is an additional combat phase.