Nosepass

Whenever a Mountain enters the battlefield
under your control, you may play Nosepass from
your graveyard.
Defender, last strike (This creature deals combat
damage after creatures without last strike.)
Whenever Nosepass is dealt damage for the first
time each turn, prevent that damage.
Whenever you draw a card, get {e}. {t}, Sacrifice Nosepass: The next artifact creature
spell you cast this turn cost {3} less to cast,
get {e}{e}{e}, or add {c}{c}.