[CONT]:Sentinel (You may only have up to four cards with "[CONT]:Sentinel" in a deck.) [AUTO]:When this unit is put on (GC), choose one of your units, and it cannot be hit until end of that battle...
Play this with COST [Counter Blast (1) & Soul Blast (1) & reveal a [Critical] trigger or [Front] trigger from your hand]! If your opponent's vanguard is grade 3 or greater, you draw a card,...
[CONT](RC):If you have a vanguard with "Blaster" in its card name, when this unit would be retired for your card's cost, you may retire it as two rear-guards.