World Parasite

When this creature enters the battlefield, attach
a land you control to this card, as long as there is
a land attached to this card, this creature gets
Indestructible
Worldly Warping-At the beginning
of your upkeep, Destroy 5 permanents target
player controls then gain life and add mana of
any color to your mana pool equal to the total
mana cost of the cards destroyed this way