Fire 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)
Swamp, it gains "{1}{b}: Fire Skeletons gains
indestructible until the end of the turn."
Mountain, it gains "{r}: Fire Skeletons gets +1/0
until end of turn."
Other: the land gains "{t}: this land does 1 damage
to target attacking creature."