Truesilver Armor

This spell costs {1} less if there are 5 or less
models in target unit
Until end of phase, whenever an enemy unit
attacks the targeted 'Grey Knight Core Infantry'
unit, unmodified wound rolls of 1-3 fail
"Praise the Emperor for His sacrifice, as He endures
so shall we. We who are hunters of Daemons shall
strive in His name eternally."
-Canticle of Absolution