Valiant Heir

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)
As long as Valiant Heir's power is greater than its base power, it gets first strike, lifelink, and untaps at the beginning of your end step.
(This card's base power is 3.)
"One day this kingdom will be mine... but until then I am the kingdom's, and I will serve it in every way I can!"