Artoria, God of Knights

If you control a Knight, Artoria, God of Knights has Indestructible.
Knight Spells cost {x} less to cast where {x} is the
number of Knights on the field.
{x}{w} Search your deck for a Knight and
put it on the field where {x} is the power of the
Knight.
Artoria, God of Knights power and toughness is
equal to the amount of Knights on the field.