Behemot trotaladeras (Cliffrunner Behemoth)
Behemot trotaladeras 

Behemot trotaladeras tiene la habilidad de vínculo vital mientras controles un permanente blanco.
Texto de reglas (Oracle, inglés)
This creature has lifelink as long as you control a white permanent.
Es adorado por su poder, celebrado por su gracia, y temido por las avalanchas que desatan sus pasos.
Legalidad
Aclaraciones de reglas (en inglés)
2009-02-01
As long as at least one permanent you control is the specified color, the ability will "work" and grant this creature the bonus. Otherwise, it won't have the bonus.
2009-02-01
Whether Cliffrunner Behemoth has haste matters only when attackers are declared. Once it's been declared as an attacker, it doesn't matter if it loses haste.
2009-02-01
Whether Cliffrunner Behemoth has lifelink matters only when it deals damage (that is, at the point when its combat damage resolves, or at the point when a spell or ability that causes it to deal damage resolves). For example, if your only white permanent is a creature that receives lethal damage at the same time Cliffrunner Behemoth deals damage, the lifelink ability will still apply and you'll gain life.