Stonewall

Defender
If X is 8 or more, Stonewall has Reach, Cast this card only using green mana
Stonewall can block X creatures
---{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}{dash}
The army advanced. Then it stopped.