Graveborn, Living Monument

Defender, Prowess, Prowess, Prowess
Whenever a player casts a noncreature
spell, create a 2/2 black zombie creature
token wih decayed and prowess
Whenever the fourth spell is cast each
turn, create x 2/2 black zombie creature
tokens with decayed and prowess,
where x is the total mana value of all
noncreature spells cast this turn