Headless Centaur Skeletons

Landbond (When this creature enters the battlefield,
pair it with a land. Destroy the creature if the land
leaves play.When a land is played you may change
its pairing to that land. The either may gain an
ability, as noted)
Green: Gains Trample.
Mountain: Gains {r}: Headless Centaur
Skeletons gets +1/+0 until end of turn.
Other: Gains {1}{b}: Headless Centaur
Skeletons gains Indestructible until end of turn.
"Do we even have living ones here?"