Magmortar

You may sacrifice a creature named Magmar and pay {r}{r} rather than pay this spells mana cost.
At the beginning of each upkeep add {r}{r}.
Whenever a red source or ability which cost {r} effects Magmortar, prevent the damage or
effect on Magmortar and it gets +3/+3 until end
of turn. {r}, {t}: Magmortar deals damage equal to its
power plus 2 to target creature. If that target is
green, snow or an artifact, this ability de