24 Jan 2013
Multiple instances of lifelink on the same creature are redundant. Activating the last ability multiple times won't cause you to gain more life.
15 Apr 2013
Until the ability that turns the Keyrune into a creature resolves, the Keyrune is colorless.
15 Apr 2013
Activating the ability that turns the Keyrune into a creature while it's already a creature will override any effects that set its power and/or toughness to another number, but effects that modify power and/or toughness without directly setting them will still apply.