Bastiodon

You may sacrifice a creature named Shieldon
rather than pay this spells mana cost.
Trample, last strike (This creature deals combat
damage after creatures without last strike.)
Bastiodon can't have -1/-1 counters placed on it.
Whenever Bastiodon is dealt damage for the first
time each turn, prevent that damage.
{2}, {t}: Put a shield counter on Bastiodon if there
isn't one on it. (If that creature would be dealt
damage or destroyed, remove a shield counter
from it instead.)