Cardfight!! Vanguard - Future Card Buddyfight - Thunder Knights, Halberd Dragon (R) DZ-TB01/050EN

[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. If your hand has two or more cards, choose a card from hand, and discard it.