Arox, Storm Betwixt Worlds

Whenever Arox enters the battlefield or attacks,
choose X lands at random, where X is the
number of spells you have cast or times you have copied a spell this turn. Put a blaze counter on
each land chosen this way. For as long as those
lands have a blaze counter on them, they have
"At the beginning of your upkeep, this land
deals 1 damage to you for each blaze counter on
it."
Fire rains, chaos reigns.