True Dragon Essence

Enchant creature
Enchanted creature gets +4/+4 and has flying,
fear, haste, trample, vigilance, "{r}: +1/+0".
Whenever a creature with converted mana cost 6
or more enters the battlefield, you may pay
{6}. If you do, return True Dragon Essence to the
battlefield attached to that creature. This ability
cost {1} less for each creature you control with
converted mana cost 6 or more.
Cycling {1}{u}