Rayquaza

Mega Evolves with Meteorite
Flying
Whenever a land enters the battlefield, if that
land's controller controls the most lands on the battlefield, Rayquaza deals damage to that player
equal to the number of lands they control.
Dragon Ascent - Put a -1/-1 counter on Rayquaza.
The next time Rayquaza attacks, it deals damage
to defending player equal to the amount of lands
they control.