d&d salamander

When d&d salamander enters the battelfield each opponent loses X*X life and you gain as much life lost this turn
{p/r}{p/r}{p/r}{p/r}{p/r}{p/r}{p/r}{p/r}{p/r}{p/r}{x}{x} take X*X turns
if you like D&D
D&d salamander power and toughness is X