Tree Singing (Signature Spell)

Remains in Play.
If this spell is cast with a casting result of 7 or more,
place a small (3") blast template so that its central
hole is within 15" of the caster.
{9}: If this spell is cast with a casting result of 9 or
more, place a large (5") blast template so that its
central hole is within 15" of the caster.
Whilst in play, the template does not move and is
treated as a woodland terrain feature. Enemy units
treat these woods as dangerous terrain.