True Hellkite Overlord

Flying, Trample, Haste
{x}{r}: True Hellkite Overlord gets +X/+0 until
end of turn. This ability cost {1} less to activate
for each 3 combat damage True Hellkite
Overlord has dealt to players and planeswalkers.
{b/g}{b/g}: Regenerate True Hellkite Overlord
"The dragon only smiles when he burns down
entire empires."